It was narrated that 'Aishah said:
"I never felt as jealous of any woman as I did of Khadijah, because I saw how the Messenger of Allah remembered her, and his Lord had told him to give her the glad tidings of a house in Paradise made of Qasab."
حَدَّثَنَا هَارُونُ بْنُ إِسْحَاقَ، حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ مَا غِرْتُ عَلَى امْرَأَةٍ قَطُّ مَا غِرْتُ عَلَى خَدِيجَةَ مِمَّا رَأَيْتُ مِنْ ذِكْرِ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ لَهَا وَلَقَدْ أَمَرَهُ رَبُّهُ أَنْ يُبَشِّرَهَا بِبَيْتٍ فِي الْجَنَّةِ مِنْ قَصَبٍ ‏.‏ يَعْنِي مِنْ ذَهَبٍ قَالَهُ ابْنُ مَاجَهْ ‏.‏
GradeSahih (Darussalam)
English reference : Vol. 3, Book 9, Hadith 1997
Arabic reference : Book 9, Hadith 2075