As for the (good) effects that comes about as a result of the Ibaadaat (acts of worship), then from them are: Relaxation of the heart; Peace of mind; Enlargement of one’s provision; a state of wellbeing, repose and tranquillity. Indeed there are many verses in the Qur’aan and a number of narrations in the Sunnah indicating to these (good) effects and that fear of Allaah (The Mighty and Majestic) and righteous actions leads to happiness in this life and the next. Allaah (The Mighty and Majestic) said:
[وَلَوۡ أَنَّ أَهۡلَ ٱلۡقُرَىٰٓ ءَامَنُواْ وَٱتَّقَوۡاْ لَفَتَحۡنَا عَلَيۡہِم بَرَكَـٰتٍ۬ مِّنَ ٱلسَّمَآءِ وَٱلۡأَرۡضِ]
”And if the people of the towns had believed and had the Taqwa (piety), certainly, We should have opened for them blessings from the heaven and the earth. [7:96]
Indeed this noble ayah mentions both worship and its (good) effects in the life of a Muslim, and that is whoever fears Allaah (The Mighty and Majestic) and believes in Him, then indeed Allaah (The Most High) will reward him and give him provision in the life of this world. Allaah will open for him blessings from the heavens and the earth– by way of rain from the sky and vegetation and treasures from the earth.
Allaah (The Mighty and Majestic) said about the people of the Scripture:
[وَلَوۡ أَنَّہُمۡ أَقَامُواْ ٱلتَّوۡرَٮٰةَ وَٱلۡإِنجِيلَ وَمَآ أُنزِلَ إِلَيۡہِم مِّن رَّبِّہِمۡ لَأَڪَلُواْ مِن فَوۡقِهِمۡ وَمِن تَحۡتِ أَرۡجُلِهِمۚ]
”And if only they had acted according to the Taurat (Torah), the Injeel (Gospel), and what has (now) been sent down to them from their Lord (the Qur’an), they would surely have gotten provision from above them and from underneath their feet.” [5:66] Meaning: The provision Allaah would have bestowed upon them by way rain from the sky, and also from beneath their feet by way of that which Allaah causes to grow in the earth, such as plants and crops; and also the treasures which Allaah causes to come out from the earth.
So what has been mentioned in these two verses [7:96 and 5:66] about the people of the towns and the people of the scripture are a worldly reward for (the one who) believes in Allaah and fears Him. And with regards to the reward in the afterlife for the believers and those who fear Allaah, then indeed Allaah has mentioned it in His statement:
[وَلَوۡ أَنَّ أَهۡلَ ٱلۡڪِتَـٰبِ ءَامَنُواْ وَٱتَّقَوۡاْ لَڪَفَّرۡنَا عَنۡہُمۡ سَيِّـَٔاتِہِمۡ وَلَأَدۡخَلۡنَـٰهُمۡ جَنَّـٰتِ ٱلنَّعِيمِ ]
‘’ And if only the people of the Scripture (Jews and Christians) had believed (in Muhammad) and warded off evil (sin, ascribing partners to Allah) and had become Al-Muttaqun (pious), We would indeed have blotted out their sins and admitted them to Gardens of pleasure (in Paradise). ‘’ [5:65]
Allaah (The Mighty and Majestic) said: [يَـٰٓأَيُّہَا ٱلَّذِينَ ءَامَنُواْ ٱتَّقُواْ ٱللَّهَ وَقُولُواْ قَوۡلاً۬ سَدِيدً۬ا ] O you who believe! Keep your duty to Allah and fear Him, and speak (always) the truth]. [33:70] This (Ayah 33:70) indicates to an act of worship (i.e. fear of Allaah and being truthful in speech); then Allaah mentioned its (good) effects, saying: [يُصۡلِحۡ لَكُمۡ أَعۡمَـٰلَكُمۡ وَيَغۡفِرۡ لَكُمۡ ذُنُوبَكُمۡۗ وَمَن يُطِعِ ٱللَّهَ وَرَسُولَهُ ۥ فَقَدۡ فَازَ فَوۡزًا عَظِيمًا]‘’He will direct you to do righteous good deeds and will forgive you your sins. And whosoever obeys Allah and His Messenger) he has indeed achieved a great achievement.’’ [33:71]
Indeed being directed towards righteous and correct actions and being forgiven one’s sins in the afterlife are (good) affects that results from Ibaadah (worship). So this noble ayah mentions both the (good) effects of the Ibaadaat (acts of worship) in this worldly life and the afterlife-in this worldly life Allaah will direct the person towards righteous and good actions and enables him to reach good, truth and correctness in all his affairs; so that he traverses the path of Allaah upon clear sightedness. And in the afterlife, Allaah will forgive him his sins and wipe away his evil deeds.
Also Allaah (The Mighty and Majestic) said:
[وَمَن يَتَّقِ ٱللَّهَ يَجۡعَل لَّهُ ۥ مَخۡرَجً۬ا ]
[وَيَرۡزُقۡهُ مِنۡ حَيۡثُ لَا يَحۡتَسِبُۚ ]
And whosoever fears Allah and keeps his duty to Him, He will make a way for him to get out (from every difficulty). And He will provide him from (sources) he never could imagine. [65:2-3] This noble ayah establishes the fact that fear of Allaah (The Mighty and Majestic)–and that is to worship Him (alone without partners); fulfil His commandments and keep away from what He has forbidden– will remove a person from critical and difficult situations. Also Allaah provides for the one who obeys and fears Him from sources he never could imagine.
Allaah (The Mighty and Majestic) said:
[وَمَن يَتَّقِ ٱللَّهَ يَجۡعَل لَّهُ ۥ مِنۡ أَمۡرِهِۦ يُسۡرً۬ا ]
‘’And whosoever fears Allah and keeps his duty to Him, He will make his matter easy for him.’’ [65:4]
Indeed, from the (good) effects of fearing Allaah (The Mighty and Majestic) is that Allaah will make a person’s affairs easy. Allaah will facilitate for him the paths towards good and opens for him paths that leads to happiness in this life and the afterlife.
Allaah (The Mighty and Majestic) said:
[وَمَن يَتَّقِ ٱللَّهَ يُكَفِّرۡ عَنۡهُ سَيِّـَٔاتِهِۦ وَيُعۡظِمۡ لَهُ ۥۤ أَجۡرًا ]
‘’And whosoever fears Allah and keeps his duty to Him, He will remit his sins from him, and will enlarge his reward.’’ [65:5]
This is from the rewards in the hereafter that comes about as a result of one’s fear of Allaah (Glorified Be He)
Allaah (The Mighty and Majestic) said:
[يَـٰٓأَيُّہَا ٱلَّذِينَ ءَامَنُوٓاْ إِن تَتَّقُواْ ٱللَّهَ يَجۡعَل لَّكُمۡ فُرۡقَانً۬ا وَيُكَفِّرۡ عَنڪُمۡ سَيِّـَٔاتِكُمۡ وَيَغۡفِرۡ لَكُمۡۗ وَٱللَّهُ ذُو ٱلۡفَضۡلِ ٱلۡعَظِيمِ ]
‘’O you who believe! If you obey and fear Allah, He will grant you Furqan a criterion [(to judge between right and wrong), or (Makhraj, i.e. making a way for you to get out from every difficulty)], and will expiate for you your sins, and forgive you, and Allah is the Owner of the Great Bounty.’’ [8:29]
This noble ayah indicates to the fact that the one who fears Allaah (The Mighty and Majestic), acts in obedience to Allaah and His Messenger, then indeed Allaah will grant him a criterion to distinguish between truth and falsehood, and he will follow the path of Allaah upon clear sightedness and guidance in this worldly life. And in the afterlife Allaah will reward him by wiping away his evil deeds and forgive him his sins.
Also, Allaah (The Most High) stated in the last part of the ayah that discusses the etiquettes to be employed in dealing with loans and debts: [وَٱتَّقُواْ ٱللَّهَۖ وَيُعَلِّمُڪُمُ ٱللَّهُۗ]-‘’So be afraid of Allah; and Allah teaches you.’’ [2:282]
And Allaah stated in the story of Nooh (alayhis-salaam) and his people:
فَقُلۡتُ ٱسۡتَغۡفِرُواْ رَبَّكُمۡ إِنَّهُ ۥ كَانَ غَفَّارً۬ا
يُرۡسِلِ ٱلسَّمَآءَ عَلَيۡكُم مِّدۡرَارً۬ا
وَيُمۡدِدۡكُم بِأَمۡوَٲلٍ۬ وَبَنِينَ وَيَجۡعَل لَّكُمۡ جَنَّـٰتٍ۬ وَيَجۡعَل لَّكُمۡ أَنۡہَـٰرً۬ا
“I (Nooh) said (to them): ‘Ask forgiveness from your Lord; Verily, He is Oft-Forgiving; He will send rain to you in abundance; And give you increase in wealth and children, and bestow on you gardens and bestow on you rivers.’ [71-10-12]
The affairs mentioned in the above verses are (good) effects that come about as a result of Ibaadah (worship); because the act of worship mentioned here is [الْإِسْتِغْفَار –to seek forgiveness] and the (good) effects that will come about as a result of it, is that Allaah will send down rain upon them in abundance; give them increase in wealth and children, and bestow on them gardens and rivers.
Also, similar to this above ayah is what Allaah mentioned about Hud (alayhis-salaam) and his people (i.e. a command Allaah commanded Prophet Hud to convey to his people):
[وَيَـٰقَوۡمِ ٱسۡتَغۡفِرُواْ رَبَّكُمۡ ثُمَّ تُوبُوٓاْ إِلَيۡهِ يُرۡسِلِ ٱلسَّمَآءَ عَلَيۡڪُم مِّدۡرَارً۬ا وَيَزِدۡڪُمۡ قُوَّةً إِلَىٰ قُوَّتِكُمۡ]
“And O my people! Ask forgiveness of your Lord and then repent to Him, He will send you (from the sky) abundant rain, and add strength to your strength.’’ [11:52]
Also, similar to this is what Allaah stated about His Prophet Muhammad (sallal-laahu-alayhi-wasallam) and the people (i.e. a command Allaah commanded Prophet Muhammad to convey to the people): [وَأَنِ ٱسۡتَغۡفِرُواْ رَبَّكُمۡ ثُمَّ تُوبُوٓاْ إِلَيۡهِ يُمَتِّعۡكُم مَّتَـٰعًا حَسَنًا إِلَىٰٓ أَجَلٍ۬ مُّسَمًّ۬ى وَيُؤۡتِ كُلَّ ذِى فَضۡلٍ۬ فَضۡلَهُ ۥۖ ] “Seek the forgiveness of your Lord, and turn to Him in repentance, that He may grant you good enjoyment, for a term appointed, and bestow His abounding Grace to every owner of grace (i.e. the one who helps and serves needy and deserving, physically and with his wealth, and even with good words) [11:3]
Allaah (The Most High) said:
[مَنۡ عَمِلَ صَـٰلِحً۬ا مِّن ذَڪَرٍ أَوۡ أُنثَىٰ وَهُوَ مُؤۡمِنٌ۬ فَلَنُحۡيِيَنَّهُ ۥ حَيَوٰةً۬ طَيِّبَةً۬ۖ وَلَنَجۡزِيَنَّهُمۡ أَجۡرَهُم بِأَحۡسَنِ مَا ڪَانُواْ يَعۡمَلُونَ]
‘’Whoever works righteousness, whether male or female, while he (or she) is a true believer (of Islamic Monotheism) verily, to him We will give a good life (in this world with respect, contentment and lawful provision), and We shall pay them certainly a reward in proportion to the best of what they used to do (i.e. Paradise in the Hereafter).’’ [16:97]
In this noble ayah is established the fact that Eemaan and righteous action leads to a good and happy–a life filled with fear of Allaah and obedience to Him, and obedience to Allaah’s Messenger, as well as abundant reward for a person in the afterlife.
To be continued… إن شاء الله
[Abridged and slightly paraphrased. Source: أثر العبادات في حياة المسلمpages: 11-17]