Sahih al-Bukhari 4250
صحيح البخاري#4250SahihNarrated Ibn `Umar:Allah's Messenger (ﷺ) appointed Usama bin Zaid as the commander of some people. Those people criticized his leadership. The Prophet (ﷺ) said, "If you speak ill of his leadership, you have already spoken ill of his father's leadership before. By Allah, he deserved to be a Commander, and he was one of the most beloved persons to me and now this (i.e. Usama) is one of the most beloved persons to me after him
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: 64:285