Sahih al-Bukhari 4916
Sahih al-Bukhari · Book 65: Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh)) · "It may be, if he divorced you (all), that his Lord (Allah) will give him instead of you, wives better than you... (V.66:5)
Narrated `Umar:
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.
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)