Abraham is known as the father of faith because God called him to leave his homeland and promised to make him the father of a great nation through whom all nations would be blessed (Genesis 12:1–3, KJV). Although he and his wife Sarah were advanced in age, God fulfilled His promise by giving them a son, Isaac, through whom the covenant continued. Abraham demonstrated remarkable faith by trusting God's promises and by being willing to offer Isaac as a sacrifice before God provided a ram in his place (Genesis 22). God made an everlasting covenant with Abraham, promising him countless descendants and the land of Canaan (Genesis 17:1–8). Because of his unwavering trust in God, Abraham is remembered throughout Scripture as an example of faith and obedience, and the New Testament teaches that all who believe in Christ are spiritual children of Abraham (Romans 4; Galatians 3:6–9).