Qur'an 33:32

يَـٰنِسَآءَ ٱلنَّبِىِّ لَسْتُنَّ كَأَحَدٍ مِّنَ ٱلنِّسَآءِ ۚ إِنِ ٱتَّقَيْتُنَّ فَلَا تَخْضَعْنَ بِٱلْقَوْلِ فَيَطْمَعَ ٱلَّذِى فِى قَلْبِهِۦ مَرَضٌ وَقُلْنَ قَوْلًا مَّعْرُوفًا

“O wives of the Prophet, you are not like anyone among women. If you fear Allāh, then do not be soft in speech [to men], lest he in whose heart is disease should covet, but speak with appropriate speech.”

Al-Ahzaab 33:32 · Saheeh International