(20) بَاب تَزْوِيجِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ خَدِيجَةَ وَفَضْلِهَا رَضِيَ اللَّهُ عَنْهَا
Narrated `Aisha:
I did not feel jealous of any woman as much as I did of Khadija because Allah's Messenger (ﷺ) used to mention her very often. He married me after three years of her death, and his Lord (or Gabriel) ordered him to give her the good news of having a palace of Qasab in Paradise.
Reference: Sahih al-Bukhari 3817
In-book reference: Book 63, Hadith 43
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 5, Book 58, Hadith 165