God commanded Moses to go to Egypt and deliver his fellow Hebrews from bondage. On the way Moses was nearly killed by God because his son was not circumcised. He was met on the way by his elder brother, Aaron, and gained a hearing with his oppressed kindred after they returned to Egypt, who believed Moses and Aaron after they saw the signs that were performed in the midst of the Israelite assembly. Moses and Aaron went to Pharaoh and told him that the Lord God of Israel wanted Pharaoh to permit the Israelites to celebrate a feast in the wilderness. Pharaoh replied that he did not know their God and would not permit them to go. They gained a second hearing with Pharaoh and changed Moses' rod into a serpent, but Pharaoh's magicians did the same with their rods. Moses and Aaron met Pharaoh at the Nile riverbank, and Moses had Aaron turn the river to blood, but Pharaoh's magicians could do the same. Moses obtained a fourth meeting, and had Aaron bring frogs from the Nile to overrun Egypt, but Pharaoh's magicians were able to do the same thing. Pharaoh asked Moses to remove the frogs and promised to let the Israelites go observe their feast in the wilderness in return. Pharaoh decided against letting the Israelites leave to observe the feast. Eventually Pharaoh let the Hebrews depart after Moses' God sent ten plagues upon the Egyptians. The third and fourth were the plague of gnats and flies. The fifth was diseases on the Egyptians' cattle, oxen, goats, sheep, camels, and horses. The sixth was boils on the skins of Egyptians. Seventh, fiery hail and thunder. The eighth plague was locusts. The ninth plague was total darkness. The tenth plague was the slaying of the Egyptian male first-born children, whereupon such terror seized the Egyptians that they ordered the Hebrews to leave. The events are commemorated as Passover, referring to how the plague "passed over" the houses of the Israelites while smiting the Egyptians