Musannaf Ibn Abi Shayba 27:650

Waki’ narrated to us, from Ya’la, from Isma’il bin Abi Khalid, from Ibn Abi Awfa, who said: I heard him say: The Messenger of Allah (peace and blessings of Allah be upon him) gave glad tidings to Khadija of a house in Paradise made of hollowed pearl. There is no clamor in it, nor any weariness.