‏ Genesis 27:4

Gen 27:1-4

When Isaac had grown old, and his eyes were dim, so that he could no longer see (מראת from seeing, with the neg. מן as in Gen 16:2, etc.), he wished, in the consciousness of approaching death, to give his blessing to his elder son. Isaac was then in his 137th year, at which age his half-brother Ishmael had died fourteen years before;
Cf. Lightfoot, opp. 1, p. 19. This correct estimate of Luther's is based upon the following calculation: - When Joseph was introduced to Pharaoh he was thirty years old (Gen 41:46), and when Jacob went into Egypt, thirty-nine, as the seven years of abundance and two of famine had then passed by (Gen 45:6). But Jacob was at that time 130 years old (Gen 47:9). Consequently Joseph was born before Jacob was ninety-one; and as his birth took place in the fourteenth year of Jacob’s sojourn in Mesopotamia (cf. Gen 30:25, and Gen 29:18, Gen 29:21, and Gen 29:27), Jacob’s flight to Laban occurred in the seventy-seventh year of his own life, and the 137th of Isaac's.
and this, with the increasing infirmities of age, may have suggested the thought of death, though he did not die till forty-three years afterwards (Gen 35:28). Without regard to the words which were spoken by God with reference to the children before their birth, and without taking any notice of Esau’s frivolous barter of his birthright and his ungodly connection with Canaanites, Isaac maintained his preference for Esau, and directed him therefore to take his things (כּלים, hunting gear), his quiver and bow, to hunt game and prepare a savoury dish, that he might eat, and his soul might bless him. As his preference for Esau was fostered and strengthened by, if it did not spring from, his liking for game (Gen 25:28), so now he wished to raise his spirits for imparting the blessing by a dish of venison prepared to his taste. In this the infirmity of his flesh is evident. At the same time, it was not merely because of his partiality for Esau, but unquestionably on account of the natural rights of the first-born, that he wished to impart the blessing to him, just as the desire to do this before his death arose from the consciousness of his patriarchal call.
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