Behold, the days come, says LORD, that I will raise to David a righteous Branch, and he shall reign as king and deal wisely, and shall execute justice and righteousness in the land.

But thou, Bethlehem Ephrathah, which are little to be among the thousands of Judah, out of thee he shall come forth to me who is to be ruler in Israel, whose goings forth are from of old, from everlasting.

And thou Bethlehem, land of Judah, are in no way least among the rulers of Judah, for out of thee will come forth a man who rules, who will tend my people Israel.

For it is evident that our Lord arose out of Judah, regarding which tribe Moses spoke nothing about the priesthood.

Birthright was

The blessings of thy father have prevailed above the blessings of my forefathers to the utmost bound of the everlasting hills. They shall be on the head of Joseph, and on the crown of the head of him who was separate from his broth

Because whom he foreknew, he also predestined to be of similar nature of the form of his Son, in order for him to be the firstborn son among many brothers.

General references

Of the sons of Judah, their generations, by their families, by their fathers' houses, according to the number of the names, from twenty years old and upward, all that were able to go forth to war,

These are the families of Judah according to those who were numbered of them, seventy-six thousand and five hundred.

then it shall be, in the day that he causes his sons to inherit that which he has, that he may not make the son of the beloved the first-born before the son of the one regarded inferior, who is the first-born.