Muhammad bin Umar al-Waqidi (may Allah have mercy on him) narrates from his teachers, who mentioned the story of Hanzalah. They say: Hanzalah bin Abi Amir (may Allah be pleased with him) took up his weapons and joined the Messenger of Allah (peace and blessings be upon him) at Uhud, at the time when he (peace and blessings be upon him) was straightening the ranks. When the idolaters were routed, Hanzalah (may Allah be pleased with him) intercepted Abu Sufyan and cut the hamstring of his horse, so the horse sank down and Abu Sufyan fell to the ground. Abu Sufyan was shouting: O people of Quraysh! I am Abu Sufyan bin Harb! And Hanzalah (may Allah be pleased with him) wanted to slaughter him with the sword. Several men heard his voice, but because of the defeat no one paid any attention to him, until al-Aswad bin Sha'ub came to his aid. He charged at Hanzalah (may Allah be pleased with him) with a spear and ran him through, and Abu Sufyan fled.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18141