Hamza ibn Abd al-Muttalib ibn Hasim ibn Abd Manaf al-Qurayshi (Arabic: حَمْزَة إبْن عَبْد ٱلْمُطَّلِب, romanized: Ḥamza ibn ʿAbd al-Muṭṭalib; c. 568–625) was a foster brother, paternal uncle, maternal second-cousin, and companion of the Islamic prophet Muhammad.
Hamza embraced Islam around 616 CE following an altercation with Abu Jahl and soon became one of Muhammad’s strongest supporters. He took part in early expeditions, notably fighting at the Battle of Badr, and was killed in the Battle of Uhud in 625 CE. His death was widely mourned, and Islamic tradition honors him as Asadullah (lit. 'Lion of God') and the "leader of the martyrs".