Uqbah, the freed slave (mawla) of Sayyiduna Jabr bin Atik (may Allah be pleased with him), narrates: I took part in the Battle of Uhud with my masters. I struck a man from the polytheists, and when I had killed him, I said: "Take this from me! I am a Persian man." When news of this reached the Prophet (peace and blessings be upon him), he said: "Why did you not say: 'Take this! I am an Ansari youth'? For the freed slave of a people is one of them."
Abu Ya'la recorded it, and its narrators are thiqat (trustworthy).