Sahih al-Bukhari 3757
صحيح البخاري#3757SahihNarrated Anas:The Prophet (ﷺ) had informed the people about the death of Zaid, Ja`far and Ibn Rawaha before the news of their death reached them. He said with his eyes flowing with tears, "Zaid took the flag and was martyred; then Ja`far took the flag and was martyred, and then Ibn Rawaha took the flag and was martyred. Finally the flag was taken by one of Allah's Swords (i.e. Khalid bin Al-Walid) and Allah gave them (i.e. the Muslims) victory
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: 62:103