O wives of the Prophet, you are not like anyone among women. If you fear Allah, then do not be soft in speech [to men], lest he in whose heart is disease should covet, but speak with appropriate speech.
The Saheeh International Quran Translation
يَٰنِسَآءَ ٱلنَّبِىِّ لَسْتُنَّ كَأَحَدٍ مِّنَ ٱلنِّسَآءِ إِنِ ٱتَّقَيْتُنَّ فَلَا تَخْضَعْنَ بِٱلْقَوْلِ فَيَطْمَعَ ٱلَّذِى فِى قَلْبِهِۦ مَرَضٌ وَقُلْنَ قَوْلًا مَّعْرُوفًاO wives of the Prophet, you are not like anyone among women. If you fear Allah, then do not be soft in speech [to men], lest he in whose heart is disease should covet, but speak with appropriate speech.