The O Antiphon for December 19, "O Root of Jesse," is drawn from Isaiah 11:1 and 11:10.
For more on the O Antiphons and the Latin text of the O Antiphon for December 19 ("O Radix Jesse"), see The O Antiphons.
O Antiphon for December 19
O Root of Jesse, Who dost stand for an ensign of the people, before Whom kings shall keep silence, and unto Whom the Gentiles shall make their supplication: come to deliver us, and tarry not.
