Riu, riu, chiu 
La guarda ribera 
Dios guarde el lobo 
De nuestra cordera.

El lobo rabioso la quiso morder,
Mas Dios poderoso la supo defender;
Quisole hazer que no pudiesse pecar,
Ni aun original esta Virgen no tuviera.
Riu, riu, chiu, etc.

Este qu’es nascido es el gran monarca,
Cristo patriarca de carne vestido;
Hanos redimido con se hazer chiquito,
Aunqu’era infinito, finito se hizera.
Riu, riu, chiu, etc. 

English translation:
Riu, riu, chiu (nightingale's sounds)
The river bank protects it,
As God kept the wolf 
from our lamb.
The rabid wolf tried to bite her,
But God Almighty knew how to defend her,
He wished to create her impervious to sin,
Nor was this maid to embody original sin.
Riu, riu, chiu, etc.

The newborn child is the mightiest monarch,
Christ patriarchal invested with flesh.
He made himself small and so redeemed us:
He who was infinite became finite.
Riu, riu, chiu, etc.