The wife of Sayyiduna Rafi' bin Khadij (may Allah be pleased with him) narrates: On the occasion of the Battle of Uhud or the Battle of Hunayn, Sayyiduna Rafi' (may Allah be pleased with him) was struck in the side by an arrow. He came to the Prophet (peace and blessings be upon him) and said: "O Messenger of Allah! Please remove the arrow." The Prophet (peace and blessings be upon him) said: "O Rafi', if you wish, you may have both the arrow and its head taken out; and if you wish, I will remove the arrow and leave the head inside, and on the Day of Resurrection I will testify in your favour that you are a martyr." He said: "O Messenger of Allah! Remove the arrow and leave the head inside." The narrator says: So the Prophet (peace and blessings be upon him) removed the arrow and left the head.
Ahmad recorded it. I do not know the wife of Sayyiduna Rafi' (may Allah be pleased with him); the remaining narrators of this report are thiqat (trustworthy).