Narrated 'Aishah:
"I did not envy any woman as I envied Khadijah - and the Messenger of Allah (ﷺ) did not marry me except after she had died - that was because the Messenger of Allah (ﷺ) gave her glad tidings of a house in Paradise made of Qasab, without clamoring nor discomforts in it." (JA)
English reference (JA): Vol. 1, Book 46, Hadith 3876 (JA)
Arabic reference (JA): Book 49, Hadith 4250 (JA)