Gen 49:9 Judah is a lion's whelp: from the prey, my son, thou art gone up: he stooped down, he couched as a lion, and as an old lion; who shall rouse him up?
Gen 49:10 The sceptre shall not depart from Judah, nor a lawgiver from between his feet, until Shiloh come; and unto him shall the gathering of the people be.
Jacob was giving prophetic blessings to his sons and he came to Judah to speak into the future. God knows the future and he spoke through holy inspired men. This is one way to prove the Holy Bible is truth.
2 Pet 1:21 For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost.
Judah is the greatest, for out of him would come a Lion who would prevail and have all power. The devil is often called a lion, but he is a pretender, the false prince of this world. There is a lion from God out of the tribe of Judah who is the prince of peace and the king of the people of God. He came to open the way for us to eternal life.
Rev 5:5 And one of the elders saith unto me, Weep not: behold, the Lion of the tribe of Juda, the Root of David, hath prevailed to open the book, and to loose the seven seals thereof.
Kings will come through Judah. King David was from the tribe of Judah and his blood line would bring forth Shiloh. This is a word meaning peace and it is used in this verse as a person who is a king and a law giver. Shiloh from the lineage of king David from the tribe of Jesus is the Lord Jesus Christ.
Isaiah prophesied of him.
Isa 9:6 For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace.
Isa 9:7 Of the increase of his government and peace there shall be no end, upon the throne of David, and upon his kingdom, to order it, and to establish it with judgment and with justice from henceforth even for ever. The zeal of the LORD of hosts will perform this.
"...and unto him shall the gathering of the people be."
Isaiah again spoke of him as the one the people would come to.
Isa 60:3 And the Gentiles shall come to thy light, and kings to the brightness of thy rising.
Isa 60:4 Lift up thine eyes round about, and see: all they gather themselves together, they come to thee: thy sons shall come from far, and thy daughters shall be nursed at thy side.
The sad thing is that he came for the Jews, for the prophesies were to the Jews of a coming prince of peace, but most of the Jews rejected him.
John 1:10 He was in the world, and the world was made by him, and the world knew him not.
John 1:11 He came unto his own, and his own received him not.
John 1:12 But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:
Shiloh has come and he is your peace. Come Israel and come all people to the eternal king from the tribe of Judah. Come out of sin and evil and be received by the king of glory into eternal life.
Rom 6:23 For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.