There have been a number of brave and self-sacrificing officers and strong and powerful champions in the army of Islam but the bravery of Hamzah bin Abdul Muttalib is recorded in the pages of history and in fact constitutes the golden leaves of the history of the battles of Islam.
Muhammed Mustafa, the Messenger of Allah (may Allah bless him and his Ahlel-Bayt), though safe under the protection of his uncle, Abu Talib, was not immune from harassment by the infidels. Whenever they found an opportunity for baiting him, they didn't miss it. On one occasion, Abu Jahl found him alone, and used much offensive and vulgar language toward him. That same evening when his uncle, Hamzah bin Abdul Muttalib, came home from a hunting expedition, his slave-girl recounted to him the tale of Abu Jahl's gratuitous insolence toward him (Muhammed), and the latter's forbearance, of which she had been an eye-witness.
Hamzah was a warrior, a hunter and a sportsman, and was little interested in the day-to-day affairs of the city. But Abu Jahl's conduct toward his nephew so roused his anger that he seized his bow, went into the assembly of the Quraysh where he (Abu Jahl) was reviewing the events of the day to his compeers, struck him at his head with his bow, causing it to bleed, and shouted: "I too have become a Muslim.