The O Antiphon for December 20, "O Key of David," is drawn from Isaiah 9:6 and 22:22.
For more on the O Antiphons and the Latin text of the O Antiphon for December 20 ("O Clavis David"), see The O Antiphons.
O Antiphon for December 20
O Key of David and Sceptre of the house of Israel, Who dost open and no man doth shut, Who dost shut and no man doth open, come and bring forth from his prisonhouse the captive that sitteth in darkness and in the shadow of death.
