Birthright. The advantages accruing to the eldest son. These were not definitely fixed in patriarchal times. Great respect was paid to him in the household, and, as the family widened into a tribe, this grew into a sustained authority, undefined save by custom, in all matters of common interest. Thus the "princes" of the congregation had probably rights of primogeniture. Numbers 7:2; Numbers 21:18; Numbers 25:14. Gradually, the rights of the eldest son came to be more definite:
(1) The functions of the priesthood in the family with the paternal blessing.
(2) A "double portion" of the paternal property was allotted by the Mosaic law. Deuteronomy 21:16-17.
(3) The eldest son succeeded to the official authority of the father.
The first-born of the king was his successor by law. 2 Chronicles 21:3. In all these, Jesus was the first-born of the father.