Musnad Abu Ya'la al-Mawsili 166:9

Al-Qasim ibn Abi Shaybah narrated to us, Wahb ibn Jarir narrated to us, from his father, from Muhammad ibn Ishaq, from Hisham ibn Urwah, from his father, from Abdullah ibn Ja'far: That the Prophet, peace and blessings of Allah be upon him, gave glad tidings to Khadijah of a house in Paradise made of hollowed pearls.