According to the Book of Exodus, Moses was born in a time when his people were increasing in number and the Egyptian Pharaoh was worried that they might help Egypt's enemies. Moses' Hebrew mother, Jochebed, hid him when the Pharaoh ordered all newborn Hebrew boys to be killed, and he ended up being adopted into the Egyptian royal family. After killing an Egyptian slave-master, Moses fled across the Red Sea to Midian where he tended the flocks of Jethro, a priest of Midian on the slopes of Mt. Horeb. After the Ten Plagues were unleashed on Egypt, Moses led the Hebrew people out of Egypt, across the Red Sea, where they based themselves at Horeb and compassed the borders of Edom. It was at this time that Moses received the Ten Commandments. Despite living to the age of 120, Moses died before reaching the Land of Israel.