Sura 8 Al-Anfal (The Spoils of War), ayah 28

1. وَاعْلَمُوا أَنَّمَا أَمْوَالُكُمْ وَأَوْلَادُكُمْ فِتْنَةٌ وَأَنَّ اللَّهَ عِنْدَهُ أَجْرٌ عَظِيمٌ

   And know that your properties and your children are but a trial and that Allah has with Him a great reward.

   8:28

Translation: Saheeh International