Today’s prayer comes from the Divine Hours as compiled by Phyllis Tickle. It is a prayer from the 7th century that has been translated from Latin: 

The Word whom earth and sea and sky adore and laud and magnify, whose might they show, whose praise they tell, in Mary’s body deigned to dwell. Blessed is the message Gabriel brought, blessed is the work the Spirit wrought, most blessed to bring to human birth the long-desired of all the earth. Lord Jesus, Virgin born, to thee eternal praise and glory be, whom with the Father we adore and Holy Spirit evermore.
Latin, 7th C.