Hamzah ibn Abdul-Muttalib accepts Islam
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One day Abu Jahl passed by the Messenger of Allah at Safa hurling insults and cursing him, but when the Messenger of Allah ignored him, he left him alone.
Soon afterwards Hamzah ibn Abdul-Muttalib arrived on the scene, returning from the hunt, carrying his bow. He was the strongest of the Quraysh and the most courageous. A
slave woman of Abdullah ibn Jud'an told him what had happened to the Messenger of Allah. Hamzah was filled with rage. He entered the Masjid and saw Abu Jahl sitting with his friends. He went towards him until he was standing over him, raised his bow and hit him with it, giving him a nasty head wound. Then he said, 'Do you insult him when I follow his religion? I say what he says.'
Abu Jahl was silent and Hamzah became a Muslim. That was a great blow to the Quraysh because Hamzah was widely respected and his courage was legendary.