Sahih al-Bukhari 4916
Narrated `Umar:
The wives of the Prophet (ﷺ) out of their jealousy, backed each other against the Prophet, so I said to 
them, "It may be, if he divorced you all, that Allah will give him, instead of you wives better than 
you." So this Verse was revealed. (66.5)
حَدَّثَنَا عَمْرُو بْنُ عَوْنٍ، حَدَّثَنَا هُشَيْمٌ، عَنْ حُمَيْدٍ، عَنْ أَنَسٍ، قَالَ قَالَ عُمَرُ ـ رضى الله عنه ـ اجْتَمَعَ نِسَاءُ النَّبِيِّ صلى الله عليه وسلم فِي الْغَيْرَةِ عَلَيْهِ فَقُلْتُ لَهُنَّ عَسَى رَبُّهُ إِنْ طَلَّقَكُنَّ أَنْ يُبَدِّلَهُ أَزْوَاجًا خَيْرًا مِنْكُنَّ‏.‏ فَنَزَلَتْ هَذِهِ الآيَةُ‏.‏