Sahih Bukhari
Oneness, Uniqueness of Allah (Tawheed)
Volume: 009 / Book Number: 093 / Hadith Number: 588
Narrated Abu Huraira:
The Prophet said that Gabriel said, "Here is Khadija coming to you with a dish of food or a tumbler containing something to drink. Convey to her a greeting from her Lord (Allah) and give her the glad tidings that she will have a palace in Paradise built of Qasab wherein there will be neither any noise nor any fatigue (trouble)." (See Hadith No. 168, Vol. 5)