Sunan an-Nasa'i 3736
سنن النسائي#3736SahihAl-Hajjaj bin As-Sawwaf narrated from Abu Az-Zubair, who said:"Jabir said: 'The Messenger of Allah said: "O Ansar! Hold on to your wealth, and do not give it on the basis of 'Umra. For whoever gives something on the basis of 'Umra, it belongs to the one to whom he gave it on that basis, for the rest of his life and after he dies
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 ZaiSahih Muslim
In-book reference: 34:18