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

Allaah [The Most High] said:

يَا أَيُّهَا الَّذِينَ آمَنُوا لَا تُلْهِكُمْ أَمْوَالُكُمْ وَلَا أَوْلَادُكُمْ عَنْ ذِكْرِ اللَّهِ ۚ وَمَنْ يَفْعَلْ ذَٰلِكَ فَأُولَٰئِكَ هُمُ الْخَاسِرُونَ

O you who believe! Let not your properties or your children divert you from the remembrance of Allah. And whosoever does that, then they are the losers.” [Soorah Al-Munaafiqoon: Ayah 9]

Allaah [The Most High] commanded His believing slaves to remember Him a lot because in that there is profit, success and abundant good.  And He [The Most High] forbade them from being diverted from His Remembrance by their wealth and children because many souls have a natural inclination towards love of wealth and children, so he (a person) gives them precedence over love of Allaah and in that there is a great loss.  And for this reason He [The Most High] said: [وَمَنْ يَفْعَلْ ذَٰلِكَ – And whoever does that] – Meaning: Diverted by his wealth and children from the Remembrance of Allaah, [فَأُولَٰئِكَ هُمُ الْخَاسِرُونَ -Then they are the losers] – Meaning: [Losers] in that eternal happiness and abiding bliss, because they preferred what will come to an end over what will abide forever.

 [Source: Tayseer Al-Kareem Ar-Rahmaan Fee Tafseer Kalaam Al-Mannaan]