Sunan Abi Dawud, Hadith 3558 ⓘ
Narrated Jabir ibn Abdullah: The Prophet said: Life-tenancy is lawful for the one to whom it is given and donation of property to go to the survivor is lawful to whom it is given.
حَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ، حَدَّثَنَا هُشَيْمٌ، أَخْبَرَنَا دَاوُدُ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، قَالَ قَالَ رَسُولُ صلى الله عليه وسلم " الْعُمْرَى جَائِزَةٌ لأَهْلِهَا وَالرُّقْبَى جَائِزَةٌ لأَهْلِهَا " .
also referenced under: Hadith 3551 (Hasan) & Book 23, Hadith 3551 (USC-MSA)