Sahih al-Bukhari 4567
صحيح البخاري#4567SahihNarrated Abu Sa`id Al-Khudri:During the lifetime of Allah's Messenger (ﷺ), some men among the hypocrites used to remain behind him (i.e. did not accompany him) when he went out for a Ghazwa and they would be pleased to stay at home behind Allah's Messenger (ﷺ) When Allah's Messenger (ﷺ) returned (from the battle) they would put forward (false) excuses and take oaths, wishing to be praised for what they had not done. So there was revealed:-- "Think not that those who rejoice in what they have done, and love to be praised for what they have not done
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 65:89