Musnad Ahmad Hadith 4218

I came to Abu Jahl on the day of Badr when his leg had been struck and he was lying on the ground, fending people off with a sword that he had. I said: Praise be to Allah Who has humiliated you, O enemy of Allah. He said: ls it anything other than a man who was killed by his own people? I started striking at him with my sword but I was not able to hit him. Then I struck his hand and his sword fell; I picked it up and struck him with it until I killed Him. Then I left him and went to the Prophet (ﷺ) and it was as if I could not wait to reach him, and I told him (the news). He said: "Do you swear by Allah, besides Whom there is no other god?" And he repeated it three times. I said: By Allah, besides Whom there is no other god. Then he set out walking with me until he stood over him and said: “Praise be to Allah who has humiliated you, O enemy of Allah. By Allah, this was the pharaoh of this nation." And my father added from Abu Ishaq that Abu Ubaidah said: And ‘Abdullah said: And he granted me his sword as booty.