Musnad Ahmad 33:1095

Ishaq ibn Yusuf narrated to us, Sa'id narrated to us, from Qatadah, from 'Ata' ibn Abi Rabah, from Jabir ibn Abdullah, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The *'umra* (gift of a house for life) is permissible for its people, or it is an inheritance for its people."