Genesis 49:8

Glorious things are here said of Judah. The mention of the crimes of the three elder of his sons had not so put the dying patriarch out of humour but that he had a blessing ready for Judah, to whom blessings belonged. Judah's name signifies praise, in allusion to which he says, Thou art he whom thy brethren shall praise, Gen 49:8. God was praised for him (Gen 29:35), praised by him, and praised in him; and therefore his brethren shall praise him. Note, Those that are to God for a praise shall be the praise of their brethren. It is prophesied that, 1. The tribe of Judah should be victorious and successful in war: Thy hand shall be in the neck of thy enemies. This was fulfilled in David, Psa 18:40. 2. It should be superior to the rest of the tribes; not only in itself more numerous and illustrious, but having a dominion over them: Thy father's children shall bow down before thee. Judah was the lawgiver, Psa 60:7. That tribe led the van through the wilderness, and in the conquest of Canaan, Jdg 1:2. The prerogatives of the birthright which Reuben had forfeited, the excellence of dignity and power, were thus conferred upon Judah. Observe, "Thy brethren shall bow down before thee, and yet shall praise thee, reckoning themselves happy in having so wise and bold a commander.

— Matthew Henry's Concise Commentary (public domain)