Sunan an-Nasa'i 3744
سنن النسائي#3744SahihAl-Laith narrated from Ibn Shihab, from Abu Salamah bin 'Abdur-Rahman, from Jabir, who said:"I heard the Messenger of Allah say: 'Whoever gives a life-long gift to a man, it belongs to him and to his heirs; his words (when he gave the gift) put an end to his rights over it, and it belongs to the one to whom it was given on the basis of 'Umra, and to his heirs
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 34:26