Deuteronomy 33:7
"And this is the blessing of Judah: and he said, Hear, LORD, the voice of Judah, and bring him unto his people: let his hands be sufficient for him; and be thou an help to him from his enemies."
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For it is evident that our Lord sprang out of Juda; of which tribe Moses spake nothing concerning priesthood.
But those mine enemies, which would not that I should reign over them, bring hither, and slay them before me.
Send thee help from the sanctuary, and strengthen thee out of Zion;
Therefore the LORD shall have no joy in their young men, neither shall have mercy on their fatherless and widows: for every one is an hypocrite and an evildoer, and every mouth speaketh folly. For all this his anger is not turned away, but his hand is stretched out still.
Happy is he that hath the God of Jacob for his help, whose hope is in the LORD his God:
For he must reign, till he hath put all enemies under his feet.
Thine hand shall find out all thine enemies: thy right hand shall find out those that hate thee.
And David enquired of the LORD, saying, Shall I go up to the Philistines? wilt thou deliver them into mine hand? And the LORD said unto David, Go up: for I will doubtless deliver the Philistines into thine hand.
Then came all the tribes of Israel to David unto Hebron, and spake, saying, Behold, we are thy bone and thy flesh.
But chose the tribe of Judah, the mount Zion which he loved.
For at that time day by day there came to David to help him, until it was a great host, like the host of God.
Now there was long war between the house of Saul and the house of David: but David waxed stronger and stronger, and the house of Saul waxed weaker and weaker.
And let it be, when thou hearest the sound of a going in the tops of the mulberry trees, that then thou shalt bestir thyself: for then shall the LORD go out before thee, to smite the host of the Philistines.
But thou, Bethlehem Ephratah, though thou be little among the thousands of Judah, yet out of thee shall he come forth unto me that is to be ruler in Israel; whose goings forth have been from of old, from everlasting.
He chose David also his servant, and took him from the sheepfolds:
The king shall joy in thy strength, O LORD; and in thy salvation how greatly shall he rejoice!
Behold, I will send my messenger, and he shall prepare the way before me: and the LORD, whom ye seek, shall suddenly come to his temple, even the messenger of the covenant, whom ye delight in: behold, he shall come, saith the LORD of hosts.