وَلَا تُعْجِبْكَ أَمْوَٰلُهُمْ وَأَوْلَـٰدُهُمْ ۚ إِنَّمَا يُرِيدُ ٱللَّهُ أَن يُعَذِّبَهُم بِهَا فِى ٱلدُّنْيَا وَتَزْهَقَ أَنفُسُهُمْ وَهُمْ كَـٰفِرُونَ
“And let neither their wealth nor children impress you [O Prophet]. Allah only intends to torment them through these things in this world, and [then] their souls will depart while they are disbelievers.”
Part of the well-established hypocrites-who-stayed-behind-from-Tabuk passage of Surat al-Tawbah.