[4] Ibn Sa'd basing his claim on al-Waqidi states that Hamza was reportedly four years older than Muhammad.
While they were there, Abd al-Muttalib noticed Wahb's niece, Hala bint Wuhayb, and he asked for her hand as well.
Wahb agreed, and Muhammad's father Abdullah and his grandfather Abd al-Muttalib were both married on the same day, in a double-marriage ceremony.
[3]: 3 Upon returning to Mecca after a hunting trip in the desert, he heard that Amr ibn Hishām (referred in Islamic scriptures as "Abu Jahl" Father of Ignorance) had insulted Muhammad[3]: 3 "speaking spitefully of his religion and trying to bring him into disrepute".
He entered the Kaaba, where ibn Hishām was sitting with the elders, stood over him and "struck him a violent blow" with his bow.
[3]: 3 Some of ibn Hishām's relatives approached to help him, but he told them, "Leave Abu Umara [Hamza] alone, for, by God, I insulted his nephew deeply".
When he became a Muslim, the Quraysh recognised that the Prophet had become strong, and had found a protector in Hamza, and so they abandoned some of their ways of harassing him".
Hamza led an expedition of thirty riders to the coast in Juhayna territory to intercept a merchant-caravan returning from Syria.
[11]: 283 Hamza fought at the Battle of Badr, where he shared a camel with Zayd ibn Haritha[11]: 293 and where his distinctive ostrich feather made him highly visible.
[11]: 297 Al-Aaswad ibn Abdalasad al-Makhzumi, who was a quarrelsome ill-natured man, stepped forth and said, "I swear to God that I will drink from their cistern or destroy it or die before reaching it".
The Abyssinian slave Wahshi ibn Harb was promised manumission by Hind bint Utba if he killed Hamza.