Musnad Ahmad 30:3215

Muhammad ibn Ja'far narrated to us, he said: Sa'id narrated to us, from Qatadah, from an-Nadr ibn Anas, from Bashir ibn Nahik, from Abu Hurairah, 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."