Qur'an 4:63

أُو۟لَـٰٓئِكَ ٱلَّذِينَ يَعْلَمُ ٱللَّهُ مَا فِى قُلُوبِهِمْ فَأَعْرِضْ عَنْهُمْ وَعِظْهُمْ وَقُل لَّهُمْ فِىٓ أَنفُسِهِمْ قَوْلًۢا بَلِيغًا

“Those are the ones of whom Allāh knows what is in their hearts, so turn away from them but admonish them and speak to them a far-reaching [i.e., effective] word.”

An-Nisaa 4:63 · Saheeh International