Genesis 27:4

That my soul may bless thee. Since his half brother Ishmael, 14 years his senior (chs. 16:16; 21:5), had died at the age of 137 years (ch. 25:17), his own increasing infirmities of age may have suggested the thought of approaching death. Without regard to God’s instructions with reference to the two children before their birth, and without taking notice of Esau’s barter of his birthright and his Canaanite marriages, Isaac apparently persisted in his preference for Esau. This preference being strengthened by his taste for game (ch. 25:28), it was natural that he should call for “venison” to celebrate the occasion.