After Abram's entrance into Canaan the Lord promised him an heir by Sarai his wife ( Genesis 17:15-17 ). Isaac was pre-eminently the child of promise ( Genesis 17:19 ; Genesis 18:9-15 ; Genesis 21:1-5 ). He was married to Rebekah, his cousin ( Genesis 24:1-67 ). He was Abraham's heir ( Genesis 25:5 ; God renewed the two great promises ( Genesis 12:1-3 ; Genesis 26:1-5 ). Isaac was a farmer and herdsman ( Genesis 26:12-25 ).