Book of Genesis
God chose Abram to be "the father of many nations." Abram changed his name to Abraham, and God promised him the land of Canaan (Israel) forever. As a sign of this promise, the sons of Abraham are circumcised. God tested Abraham's loyalty by asking him to kill his son Isaac. Abraham was ready to do it, but God sent an angel to stop him. God told him there would be no more human sacrifice.