O magnum mysterium et admirabile sacramentum ut animalia viderent Dominum natum jacentem in praesepio. O beata Virgo, cuius viscera [bad word] portare Dominum Jesum Christum. Alleluia.

How great a mystery and wonderful a sacrament that beasts should see the newborn Lord lying in a manger. O blessed Virgin, whose body was worthy to bear the Lord Jesus Christ. Alleluia.