O Emmanuel

O Emmánuel, Rex et légifer noster, exspectátio géntium, et Salvátor eárum: veni ad salvándum nos, Dómine, Deus noster.

O Emmanuel, our King and our Law-giver, Longing of the Gentiles, yea, and Salvation thereof; come to save us, O Lord our God! 

The 'O Emmánuel'  stanza from 'O Come, O Come Emanuel':

Veni, veni Emmanuel!
Captivum solve Israel!
Qui gemit in exilio,
Privatus Dei Filio,

Gaude, gaude, Emmanuel
nascetur pro te, Israel. 

O come, O come, Emmanuel,
And ransom captive Israel,
That mourns in lonely exile here,
Until the Son of God appear.

Rejoice! Rejoice! Emmanuel
Shall come to thee, O Israel.

The following is from the New Liturgical Movement

The medieval use of Augsburg in Germany contains a particularly interesting enrichment of the liturgy on these days. Each O is accompanied by a special chapter, and a special concluding oration, both of which refer back to it; these form a kind of scriptural and euchological commentary on the much older antiphons. Like many medieval uses, that of Augsburg also added other antiphons to the series, which I will note in another post next week; here are the chapters and prayers which go with the seven oldest antiphons, those found in the Roman Breviary. At Augsburg, the Os began on December 13th, and so I have noted them here.

December 19 (23 in the Roman Breviary)

Capitulum Dominus enim judex noster, Dominus legifer noster, Do- minus rex noster, ipse sal- vabit nos.	The Chapter For the Lord is our judge, the Lord is our lawgiver, the Lord is our king: he will save us. (Isaiah 33, 22)
Aña O Emmanuel, * Rex et legifer noster, exspectatio gentium, et Salvator earum: veni ad salvandum nos, Do- mine, Deus noster.	Aña O Emmanuel, * our King and Lawgiver, longing of the Gentiles, and Savior thereof: come Thou to save us, o Lord our God.
Oratio Omnipotens Christe, Unige- genite Dei, propitius ad sal- vandum populum in te cre- dentem veni: ut benignitate solita ab omni dubietate et metu temporis nos jubeas liberari: Qui cum Deo Patre.	The Prayer Christ Almighty, Only begotten Son of God, of Thy mercy come Thou to save the people that believeth in Thee; that by Thy wonted kindliness, Thou mayest command us to be freed of every doubt, and fear of our times. Who with the Father...