Jacob, a Hebrew patriarch, was the son of Isaac and grandson of Abraham, traditionally considered the ancestor of the Israelites. His narrative is recorded in the Book of Genesis. As the younger twin brother of Esau, he employed deception to obtain his father Isaac's blessing and Esau's birthright. During a journey to Canaan, he wrestled all night with a divine being (often interpreted as an angel or God), who blessed him and changed his name to Israel. Jacob fathered thirteen children, ten of whom became the founders of the tribes of Israel. His favored son, Joseph, was sold into slavery in Egypt by his brothers. The family was later reunited when a famine compelled the brothers to seek grain in Egypt, where Joseph had risen to a position of power.