Moses was the Hebrew prophet mentioned in the Old Testament. He was used by God to lead the Israelites out of slavery in Egypt. God gave the law (Exodus 20) to Moses on Mount Sinai. Moses is mentioned 80 times in the New Testament. He is considered to be the pre-eminent prophet in the Old Testament.
Moses was born to a Hebrew slave and then was hidden in a small ark and set adrift in the Nile. He was found by Pharaoh's daughter who raised him as her own son. He gained prominence in the house of Pharaoh. When he grew up, in order to protect one of the Hebrew slaves, he killed an Egyptian. When this was found out, he was forced to flee into the desert. It was there that God trained him and eventually called him to be a prophet to return to Egypt and be used by God to set the Israelites free from the slavery they were enduring in Egypt.