فَتَرَى ٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌۭ يُسَـٰرِعُونَ فِيهِمْ يَقُولُونَ نَخْشَىٰٓ أَن تُصِيبَنَا دَآئِرَةٌۭ ۚ فَعَسَى ٱللَّهُ أَن يَأْتِىَ بِٱلْفَتْحِ أَوْ أَمْرٍۢ مِّنْ عِندِهِۦ فَيُصْبِحُوا۟ عَلَىٰ مَآ أَسَرُّوا۟ فِىٓ أَنفُسِهِمْ نَـٰدِمِينَ
“You see those with sickness in their hearts racing for their guardianship, saying [in justification], "We fear a turn of fortune will strike us." But perhaps Allah will bring about [your] victory or another favor by His command, and they will regret what they have hidden in their hearts.”
Part of the same passage (Q5:52-56) following the warning against untrustworthy allies, in the context of Banu Qaynuqa's expulsion described at this event.