Sunan an-Nasa'i 3783
سنن النسائي#3783SahihAbdur-Rahman bin Samurah said:"The Messenger of Allah said: 'If you swear an oath, offer expiation for your oath, then do that which is better
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: 35:23