Mukhtasar Bukhari

Narrated from Sayyiduna Anas (may Allah be pleased with him) that the Noble Prophet (peace and blessings of Allah be upon him) informed about the martyrdom of Sayyiduna Zaid, Ja’far, and Ibn Rawaha (may Allah be pleased with them)... and the rest of the hadith is mentioned which has already passed. (See the Book: On the Description of Funerals... Chapter: The one who informs the relatives of the deceased about his death.) Then he said: “Now it, that is, the flag, was taken by one of the swords of Allah (Sayyiduna Khalid bin Walid, may Allah be pleased with him) until Allah granted victory to the Muslims.”