The document recounts Moses' encounter with God at Mount Horeb. Moses was tending his father-in-law's flock when he saw a burning bush that was not being consumed by the fire. God called out to Moses from the bush and told him to take his sandals off because he was standing on holy ground. God revealed himself as the God of Abraham, Isaac and Jacob. God told Moses he had seen the suffering of the Israelites in Egypt and was sending Moses to Pharaoh to demand that he let the Israelites go.