o root (radix) of jesse's Stem

sign of God’s love for all his people: come to save us without delay, who stands for an ensign of the people, before whom kings shall keep silence and unto whom the Gentiles shall make supplication! Come to deliver us, and tarry not.
You have been raised up as a sign for all peoples; kings stand silent in your presence; the nations bow down in worship before you. Come, let nothing keep you from coming to our aid. Isaiah had prophesied. But a shoot shall sprout from the stump of Jesse, and from his roots a bud shall blossom. (Isaiah 11:1), and on that day, the root of Jesse, set up as a signal for the nations, the Gentiles shall seek out, for his dwelling shall be glorious. (Isaiah 11:10). Remember also that Jesse was the father of King David, and Micah had prophesied that the Messiah would be of the house and lineage of David and be born in Davids city, Bethlehem (Micah 5:1).