A shoot shall sprout from the stump of Jesse, and from his roots a bud shall blossom. The Spirit of the LORD shall rest upon him. He shall judge the poor with justice, and decide aright for the land's afflicted. Justice shall be the band around his waist, and faithfulness a belt upon his hips. (Is 11:1-10)
https://bible.usccb.org/bible/readings/120324.cfm
The Advent Carol, Lo How a Rose E’er Blooming, comes from this passage which focuses on justice, especially justice for the poor and the afflicted. Saint Francis Xavier (1506-1552) was a cofounder of the Jesuits with Saint Ignatius of Loyola (1491-1556). He was a missionary to India, the Far East and Japan.