Musnad Ahmad 30:2418

Yahya narrated to us, from Ibn Abi Arubah, from Qatadah, from An-Nadr ibn Anas, from Bashir ibn Nahik, from Abu Hurairah, from the Prophet, peace and blessings of Allah be upon him, who said: "The *‘umra* (gift of a house for life) is an inheritance for its people, or a gift for its people."