Isaac:

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; 18:9-15; 21:1-5). He was married to Rebekah, his cousin (Genesis 24:1-67). He was Abraham's heir (Genesis 25:5), and to him God renewed the two great promises (Genesis 12:1-3; 26:1-5). Isaac was a farmer and herdsman (Genesis 26:12-25).