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