The Paris Breviary of 1736 adds two antiphons to Great Antiphons/O Antiphons sung at the Magnificat at Vespers during the last days of Advent in order to create a novena leading up to Christmas Eve Starting on December 15 and going to December 23. This antiphon is used on December 20 in the Paris Breviary.
O Sancte Sanctorum, speculum sine macula Dei maiestatis, et Imago bonitatis illius: veni ut deleatur iniquitas, et adducatur iustitia sempiterna.
Words: Paris Breviary, 1736.
This is the English translation used by A.C.A. Hall in his 1914 article on the O Antiphons:
O Holy of Holies, the spotless mirror of the power of God, and the image of His goodness: Come and blot out iniquity, and bring in everlasting righteousness.