Jami` at-Tirmidhi, Book 49, Hadith 4250 (In-Book) ⓘ
Narrated 'Aishah: "I did not envy any woman as I envied Khadijah - and the Messenger of Allah did not marry me except after she had died - that was because the Messenger of Allah gave her glad tidings of a house in Paradise made of Qasab, without clamoring nor discomforts in it."
حَدَّثَنَا الْحُسَيْنُ بْنُ حُرَيْثٍ، حَدَّثَنَا الْفَضْلُ بْنُ مُوسَى، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ مَا حَسَدْتُ أَحَدًا مَا حَسَدْتُ خَدِيجَةَ وَمَا تَزَوَّجَنِي رَسُولُ اللَّهِ صلى الله عليه وسلم إِلاَّ بَعْدَ مَا مَاتَتْ وَذَلِكَ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم بَشَّرَهَا بِبَيْتٍ فِي الْجَنَّةِ مِنْ قَصَبٍ لاَ صَخَبَ فِيهِ وَلاَ نَصَبَ . قَالَ هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ . مِنْ قَصَبٍ قَالَ إِنَّمَا يَعْنِي بِهِ قَصَبَ اللُّؤْلُؤِ .
also referenced under: Hadith 3876 (Reference) & Volume 6, Book 46, Hadith 3876 (DarusSalam)