Birthright

(1.) This word denotes the special privileges and advantages belonging to the first-born son among the Jews. He became the priest of the family. Thus Reuben was the first-born of the patriarchs, and so the priesthood of the tribes belonged to him. That honour was, however, transferred by God from Reuben to Levi (Num. 3:12, 13; 8:18). (2.) The first-born son had allotted to him also a double portion of the paternal inheritance (Deut. 21:15-17). Reuben was, because of his undutiful conduct, deprived of his birth-right (Gen. 49:4; 1 Chr. 5:1). Esau transferred his birth-right to Jacob (Gen. 25:33). (3.) The first-born inherited the judicial authority of his father, whatever it might be (2 Chr. 21:3). By divine appointment, however, David excluded Adonijah in favour of Solomon. (4.) The Jews attached a sacred importance to the rank of "first-born" and "first-begotten" as applied to the Messiah (Rom. 8:29; Col. 1:18; Heb. 1:4-6). As first-born he has an inheritance superior to his brethren, and is the alone true priest.

or PRIMOGENITURE, the right of the first-born or eldest son. The birthright, or right of primogeniture, had many privileges annexed to it. The first-born was consecrated to the Lord, Exod. xxii, 29; had a double portion of the estate allotted him, Deut. xxi, 17; had a dignity and authority over his brethren, Gen. xlix, 3; succeeded in the government of the family or kingdom, 2 Chron. xxi, 3; and, as some with good reason suppose, in ancient times to the priesthood or chief government in matters ecclesiastical. Jacob, having bought Esau’s birthright, acquired a title to the particular blessing of his dying father; and, accordingly, he had consigned to him the privilege of the covenant which God made with Abraham, that from his loins the Messiah should spring: a prerogative which descended to his posterity. Reuben forfeited the blessings of his birthright, as we see by the express declaration of his father Jacob, in his benediction of his children, Gen. xlix, 1, &c, for the crime of incest with his father’s concubine, on account of which his tribe continued all along in obscurity; while the priesthood was conferred on Levi, the government on Judah, and the double portion on Joseph, to descend to their respective tribes. And this preëminence of the first-born took place from the beginning, and as much belonged to Cain, before his forfeiture of it, as it did to Reuben before his. See Genesis iv, 7; xlix, 3. Thus the patriarchs, Abraham, Isaac, and Jacob, offered sacrifices, and were priests as well as kings in their respective families, Gen. xii, 7, 8; xiii, 18; xvii, 7; xxvi, 25; xxxi, 54; xxxv, 7. Job, in Arabia, acted in the same capacity, Job, i, 5; and it is highly probable that, among the ancient Heathen nations in general, the first-born were entitled not only to the civil authority, but also to the priesthood. This seems to have been the case in Egypt, in the time of Moses: and hence Yahweh’s destroying their first-born, as it was the last miracle wrought in that country before the Exodus, so was it the most dreadful, and most effectual in prevailing on Pharaoh and the Egyptians to dismiss the Israelites.