Mattathias lived during a period of growing conflict between Jewish religious traditions and the policies of the Seleucid Empire. Antiochus IV Epiphanes attempted to impose religious practices that many Jews regarded as violations of God’s law.
According to 1 Maccabees, Mattathias belonged to the priestly family of Jehoiarib. He had five sons: John, Simon, Judas, Eleazar, and Jonathan. The family lived in Modein, northwest of Jerusalem.
The turning point came when royal officials arrived in Modein and demanded sacrifices according to the king’s commands. Mattathias refused. When another Jewish man stepped forward to perform the sacrifice, Mattathias killed him and the royal official supervising the ceremony. He then destroyed the altar.
Mattathias called on those who wished to remain faithful to the Jewish law to join him. He and his followers withdrew into the hills and organized resistance against Seleucid authority and those supporting its religious policies.
When Jewish refugees were attacked on the Sabbath, some refused to defend themselves and were killed. Mattathias and his followers then decided that defending themselves against attack on the Sabbath was necessary for survival.
Mattathias led the movement only briefly. Before his death, he encouraged his sons to continue defending their ancestral faith. He recommended Simon as an adviser and Judas as military commander.
He died around 166 BC and was buried in the family tomb at Modein. His sons continued the revolt, a defining event in Jewish history during the Second Temple period.