In The Name of Allaah, The Most Merciful, The Bestower of Mercy

Imaam Abdul Azeez Bin Baaz (rahimahullaah) said:

Disbelief and sins are the cause of every affliction and evil in this life and the next. As for Tawheed of Allaah, belief in Allaah and His Messengers, obedience to Allaah and His Messengers, holding fast to Allaah’s Sharee’ah and calling to it, and rejecting what is in opposition to it, this is the cause of every good in this life and the hereafter.  And adhering firmly to it, enjoining it and co-operating upon it is the (real) honour in this life and the hereafter, safety from every hated thing and protection from every Fitnah, as Allaah (The Most High) said:

يَا أَيُّهَا الَّذِينَ آمَنُوا إِن تَنصُرُوا اللَّهَ يَنصُرْكُمْ وَيُثَبِّتْ أَقْدَامَكُمْ

O you who believe! If you help (in the cause of) Allah, He will help you, and make your foothold firm. 47:7

And Allaah (The Most High) said:

وَلَيَنصُرَنَّ اللَّهُ مَن يَنصُرُهُ ۗ إِنَّ اللَّهَ لَقَوِيٌّ عَزِيزٌ

الَّذِينَ إِن مَّكَّنَّاهُمْ فِي الْأَرْضِ أَقَامُوا الصَّلَاةَ وَآتَوُا الزَّكَاةَ وَأَمَرُوا بِالْمَعْرُوفِ وَنَهَوْا عَنِ الْمُنكَرِ ۗ وَلِلَّهِ عَاقِبَةُ الْأُمُورِ

Verily, Allâh will help those who help His (Cause). Truly, Allâh is All-Strong, All-Mighty.  Those (Muslim rulers) who, if We give them power in the land, (they) order for Iqamat-as-Salât. [i.e. to perform the five compulsory congregational Salât (prayers) (the males in mosques)], to pay the Zakât and they enjoin Al-Ma’rûf (i.e. Islâmic Monotheism and all that Islâm orders one to do), and forbid Al-Munkar (i.e. disbelief, polytheism and all that Islâm has forbidden) [i.e. they make the Qur’ân as the law of their country in all the spheres of life]. And with Allâh rests the end of (all) matters (of creatures). 22:40-41

And Allaah (Glorified be He) said:

وَعَدَ اللَّهُ الَّذِينَ آمَنُوا مِنكُمْ وَعَمِلُوا الصَّالِحَاتِ لَيَسْتَخْلِفَنَّهُمْ فِي الْأَرْضِ كَمَا اسْتَخْلَفَ الَّذِينَ مِن قَبْلِهِمْ وَلَيُمَكِّنَنَّ لَهُمْ دِينَهُمُ الَّذِي ارْتَضَىٰ لَهُمْ وَلَيُبَدِّلَنَّهُم مِّن بَعْدِ خَوْفِهِمْ أَمْنًا ۚ يَعْبُدُونَنِي لَا يُشْرِكُونَ بِي شَيْئًا ۚ وَمَن كَفَرَ بَعْدَ ذَٰلِكَ فَأُولَٰئِكَ هُمُ الْفَاسِقُونَ

Allâh has promised those among you who believe, and do righteous good deeds, that He will certainly grant them succession to (the present rulers) in the earth, as He granted it to those before them, and that He will grant them the authority to practice their religion, that which He has chosen for them (i.e. Islâm). And He will surely give them in exchange a safe security after their fear (provided) they (believers) worship Me and do not associate anything (in worship) with Me. But whoever disbelieved after this, they are the Fâsiqûn (rebellious, disobedient to Allâh). 24:55

And Allaah (Glorified be He) said:

وَلَوْ أَنَّ أَهْلَ الْقُرَىٰ آمَنُوا وَاتَّقَوْا لَفَتَحْنَا عَلَيْهِم بَرَكَاتٍ مِّنَ السَّمَاءِ وَالْأَرْضِ وَلَٰكِن كَذَّبُوا فَأَخَذْنَاهُم بِمَا كَانُوا يَكْسِبُونَ

And if the people of the towns had believed and had the Taqwâ (piety), certainly, We should have opened for them blessings from the heaven and the earth, but they belied (the Messengers). So We took them (with punishment) for what they used to earn (polytheism and crimes, etc.). 7:96

Allaah (Glorified be He) has made known in many Aayaat that indeed the punishments that befell the previous nations, such as severe punishment by way of floods, winds, and by way of the Saihah (torment), drowning, swallowed by the earth and other than that- all of that was due to their unbelief and sins, as He (The Mighty and Majestic) said:

فَكُلًّا أَخَذْنَا بِذَنبِهِ ۖ فَمِنْهُم مَّنْ أَرْسَلْنَا عَلَيْهِ حَاصِبًا وَمِنْهُم مَّنْ أَخَذَتْهُ الصَّيْحَةُ وَمِنْهُم مَّنْ خَسَفْنَا بِهِ الْأَرْضَ وَمِنْهُم مَّنْ أَغْرَقْنَا ۚ وَمَا كَانَ اللَّهُ لِيَظْلِمَهُمْ وَلَٰكِن كَانُوا أَنفُسَهُمْ يَظْلِمُونَ

So We punished each (of them) for his sins, of them were some on whom We sent Hâsiban (a violent wind with shower of stones) [as the people of Lout (Lot)], and of them were some who were overtaken by As-Saihah [torment  awful cry, etc. (as Thamûd or Shu’aib’s people)], and of them were some whom We caused the earth to swallow [as Qârûn (Korah)], and of them were some whom We drowned [as the people of Nûh (Noah), or Fir’aun (Pharaoh) and his people]. It was not Allâh Who wronged them, but they wronged themselves. 29:40

Allaah (The Most High) said:

وَمَا أَصَابَكُم مِّن مُّصِيبَةٍ فَبِمَا كَسَبَتْ أَيْدِيكُمْ وَيَعْفُو عَن كَثِيرٍ

And whatever of misfortune befalls you, it is because of what your hands have earned. And He pardons much. 42:30

And Allaah (Glorified be He) commanded His slaves to repent to Him and humble themselves to him when calamities occur. He (Glorified be He) said: [يَا أَيُّهَا الَّذِينَ آمَنُوا تُوبُوا إِلَى اللَّهِ تَوْبَةً نَّصُوحًا عَسَىٰ رَبُّكُمْ أَن يُكَفِّرَ عَنكُمْ سَيِّئَاتِكُمْ وَيُدْخِلَكُمْ جَنَّاتٍ تَجْرِي مِن تَحْتِهَا الْأَنْهَارُ] O you who believe! Turn to Allâh with sincere repentance! It may be that your Lord will remit from you your sins, and admit you into Gardens under which rivers flow (Paradise) 66:8

Allaah (Glorified be He) said:

وَتُوبُوا إِلَى اللَّهِ جَمِيعًا أَيُّهَ الْمُؤْمِنُونَ لَعَلَّكُمْ تُفْلِحُونَ

And all of you beg Allâh to forgive you all, O believers, that you may be successful. 24:31

And Allaah (Glorified be He) said:

وَلَقَدْ أَرْسَلْنَا إِلَىٰ أُمَمٍ مِّن قَبْلِكَ فَأَخَذْنَاهُم بِالْبَأْسَاءِ وَالضَّرَّاءِ لَعَلَّهُمْ يَتَضَرَّعُونَ

فَلَوْلَا إِذْ جَاءَهُم بَأْسُنَا تَضَرَّعُوا وَلَٰكِن قَسَتْ قُلُوبُهُمْ وَزَيَّنَ لَهُمُ الشَّيْطَانُ مَا كَانُوا يَعْمَلُونَ

Verily, We sent (Messengers) to many nations before you (O Muhammad) And We seized them with extreme poverty (or loss in wealth) and loss in health with calamities so that they might believe with humility.  When Our Torment reached them, why then did they not believe with humility? But their hearts became hardened, and Shaitân (Satan) made fair-seeming to them that which they used to do. 6:42-43

In this noble ayah, Allaah urges His slaves to desire humbling themselves to Him and show their need of Him.  And that they should ask Him for succour when visited with calamities such as illnesses, injuries, killing, earthquakes, hurricanes and other calamities.  This is the meaning of the ayah: [فَلَوْلَا إِذْ جَاءَهُم بَأْسُنَا تَضَرَّعُوا -When Our Torment reached them, why then did they not believe with humility], meaning: why did they not humble themselves when our torment came to them.

Then Allaah (Glorified be He) made known about the hardening of their hearts and shaytaan making fair-seeming to them their evil actions, and that all of this prevented them from repentance, humility and seeking Allaah’s forgiveness.   He (The Most High) said: [وَلَٰكِن قَسَتْ قُلُوبُهُمْ وَزَيَّنَ لَهُمُ الشَّيْطَانُ مَا كَانُوا يَعْمَلُون – But their hearts became hardened, and Shaitân (Satan) made fairseeming to them that which they used to do. 6:42-43]

And it has been reported about the Rightly Guided Khaleefah (The Chief of the Believers) Umar Bin Abdul Azeez (rahimahullaah), that when an earthquake occurred during his time, he wrote to his governors and commanded them to command the Muslims to repent to Allaah, humble themselves before Him and seek forgiveness for their sins.

——————————————————————————————————————

[Source: from a small risaalah of Imaam Bin Baaz (rahimahullaah) titled: ‘Obligation of repenting to Allaah’ Page 3-4’ Abridged and slightly paraphrased]