Sahih Muslim , Book 31, Hadith 5970 (USC-MSA) ⓘ
'A'isha reported that Allah's Messenger (may peace he upon him) gave glad tidings to Khadija bint Khuwailid of a palace in Paradise.
حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدَةُ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ بَشَّرَ رَسُولُ اللَّهِ صلى الله عليه وسلم خَدِيجَةَ بِنْتَ خُوَيْلِدٍ بِبَيْتٍ فِي الْجَنَّةِ .
also referenced under: Book 44, Hadith 106 (In-Book) & Hadith 2434 (Reference)