The oldest form of this Christmas carol is found in a Benedictine Processional belonging to the beginning of the fourteenth century.
I
Zion is glad this glorious morn:
A babe in Bethlehem is born.
II
See where He lies in manger low,
Whose kingly reign no end shall know.
III
The ox and ass that filled the stall,
Knew that the babe was Lord of all.