In the first book of Chronicles we find these two verses [emphasis added, here and throughout]:
1 Chronicles 5:2 Though Judah prevailed over his brothers, and from him came the leader, yet the birthright belonged to Joseph),
1 Chronicles 28:4 “Yet, the LORD, the God of Israel, chose me from all the house of my father to be king over Israel forever. For He has chosen Judah to be a leader; and in the house of Judah, my father’s house, and among the sons of my father He took pleasure in me to make me king over all Israel.
This idea of Judah being the leader goes back to the prophecy of Jacob:
Genesis 49:10 “The scepter shall not depart from Judah,
Nor the ruler’s staff from between his feet,
Until Shiloh comes,
And to him shall be the obedience of the peoples.
And thus Jesus relied upon this prophecy from His earthly ancestor when He pointed out to the Samaritan woman that it was from His side of the house of Israel and not hers that Messiah would come:
John 4:22 “You worship what you do not know; we worship what we know, for salvation is from the Jews.
The term “Jew” is, of course, derived from the name “Judah.”
The book of Revelation adds its own emphasis to this unique role for Judah:
Revelation 5:5 and one of the elders *said to me, “Stop weeping; behold, the Lion that is from the tribe of Judah, the Root of David, has overcome so as to open the book and its seven seals.”
Thus from one end of the Bible (Genesis) to the other (Revelation), the promise of salvation and thus of Messiah is through Judah.
Scripture quotations taken from the NASB, unless otherwise noted.