Sahih al-Bukhari 4010
صحيح البخاري#4010SahihNarrated Ibn Shihab:I asked Al-Husain bin Muhammad who was one of the sons of Salim and one of the nobles amongst them, about the narration of Mahmud bin Ar-Rabi 'from `Itban bin Malik, and he confirmed it
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: 64:61