Surah An-Nisa, Verse 63

أُوْلَٰٓئِكَ ٱلَّذِينَ يَعۡلَمُ ٱللَّهُ مَا فِي قُلُوبِهِمۡ فَأَعۡرِضۡ عَنۡهُمۡ وَعِظۡهُمۡ وَقُل لَّهُمۡ فِيٓ أَنفُسِهِمۡ قَوۡلَۢا بَلِيغٗا٦٣

ulāika alladhīna yaʿlamu l-lahu mā fī qulūbihim fa-aʿriḍ ʿanhum waʿiẓ'hum waqul lahum fī anfusihim qawlan balīghan

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.