(20) بَاب تَزْوِيجِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ خَدِيجَةَ وَفَضْلِهَا رَضِيَ اللَّهُ عَنْهَا
Narrated `Aisha:
I did not feel jealous of any of the wives of the Prophet (ﷺ) as much as I did of Khadija (although) she died before he married me, for I often heard him mentioning her, and Allah had told him to give her the good tidings that she would have a palace of Qasab (i.e. pipes of precious stones and pearls in Paradise), and whenever he slaughtered a sheep, he would send her women-friends a good share of it.
Reference: Sahih al-Bukhari 3816
In-book reference: Book 63, Hadith 42
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 5, Book 58, Hadith 164