Advent Antiphon for December 20

See this post for the history of the Advent Antiphons. It’s swell.

O-Antiphons_02O Clavis David (O Key of David)
O Key of David and sceptre of the House of Israel;
you open and no one can shut;
you shut and no one can open:
Come and lead the prisoners from the prison house,
those who dwell in darkness and the shadow of death.

cf. Isaiah 22.22, 42.7