Lyrics:

O nata lux de lumine, Jesu redemptor saeculi,
Dignare clemens supplicum laudes precesque sumere.
Qui carne quondam contegi dignatus es pro perditis
Nos membra confer effici Tui beati corporis.

Translation:

O Light born of Light, Jesus, redeemer of the world,
mercifully deign to accept the praises and prayers of your suppliants.
O you who once deigned to be hidden in flesh on behalf of the lost,
grant us to be made members of your blessed body.