The Great O Antiphons, used to bookend the Magnificat in Vespers in the last seven days before Christmas. The Treasury of Daily Prayer includes them in the daily propers section. As each of these Old Testament names for God is prayed, and Christ is invoked to come to us, the clarity of whom the Blessed Mother bore is driven home in an unmistakable way, climaxing in the confession that He is Emmanuel, God with us. The hymn of the day for the fourth Sunday in Advent is the versification of these antiphons “O Come, O Come, Emmanuel.”
O King of the nations, the ruler they long for, the cornerstone uniting all people: Come and save us all, whom You formed out of clay.
Chapter: Jeremiah 23, 5
Behold the days come, saith the Lord, and I will raise up to David a just branch: and a king shall reign, and shall be wise, and shall execute judgment and justice upon the earth.
The Prayer – Stir up Thy strength, O Lord, we beseech Thee, and come; us, that we may merit to be delivered from the imminent dangers of our sins by Thee our protector, and saved by Thee our liberator. Who livest.