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) (DE)
USC-MSA web (English) reference: Vol. 6, Book 60, Hadith 438 (DE)
Arabic reference (DE): Book 65, Hadith 4916 (DE)