Tafseer Ibn Kathir of AL ANFAAL [28]

وَاعْلَمُواْ أَنَّمَا أَمْوَالُكُمْ وَأَوْلاَدُكُمْ فِتْنَةٌ وَأَنَّ اللّهَ عِندَهُ أَجْرٌ عَظِيمٌ

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