Sunan an-Nasa'i 3785
سنن النسائي#3785SahihIt was narrated that 'Adiyy bin Hatim said:"The Messenger of Allah said: 'Whoever swears an oath, then sees something better than it, let him do that which is better and offer expiation for his oath
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
In-book reference: 35:25