Nesciens mater virgo virum
peperit sine dolore
salvatorem saeculorum.
Ipsum regem angelorum
sola virgo lactabat,
ubere de caelo pleno.
(some sources have ubera de coelo plena)
English translation
Knowing no man, the Virgin mother
bore, without pain,
the Saviour of the world.
Him, the king of angels,
only the Virgin suckled,
breasts filled by heaven.
Spanish translation
La Virgen Madre, sin conocer varón,
dio a luz sin dolor
al Salvador del mundo.
Al mismo Rey de los ángeles
solo la Virgen amamantaba
con sus pechos llenos de cielo. Translation by Alejandro Borrego Pérez