Mishkat al-Masabih

He told that when one of the Muslims was going quickly after one of the polytheists in front of him, he heard the crack of a whip above him and the voice of a horseman saying, "Go on, Haizum[*]," and saw the polytheist in front of him fall on his back. He looked at him and saw his nose was cut and his face split as with a slash of a whip, and the whole of that turned green. When the Ansari came and told God's messenger he said, "You have spoken the truth; that was one of the troops of the third heaven." That day they killed seventy and took seventy prisoners. *The name of the angel's horse. Muslim transmitted it.