According to the Book of Exodus, Moses saw a bush burning without being consumed.
The scene occurs at Mount Horeb, also called the mountain of God, while Moses is tending the flock of Jethro, his father-in-law. Exodus says an angel of the Lord appeared in a flame of fire from within a bush. Moses noticed that the bush was burning but did not burn up, so he approached to investigate.
The voice from the bush then called Moses by name and instructed him to remove his sandals because he was standing on holy ground. God commissioned Moses to lead the Israelites out of Egypt and promised to be with him. The episode is the pivotal call narrative that begins Moses's public mission.
The burning bush is not described as an ordinary tree, lamp, or stone. The Hebrew term usually refers to a thorny bush, though translations differ in the exact plant identification. The event also explains why Horeb becomes a sacred setting in the biblical account.