O magnum mysterium,

et admirabile sacramentum,

ut animalia viderent Dominum natum,

iacentem in praesepio!

Beata Virgo, cujus viscera

meruerunt portare

Dominum Iesum Christum.

Alleluia!

​

English translation:

​

O great mystery,

and wonderful sacrament,

that animals should see the newborn Lord,

lying in a manger!

Blessed is the virgin whose womb

was worthy to bear

the Lord, Jesus Christ.

Alleluia!