This text comes from Catholic Hymns (1860), a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Mother of our Lord and Saviour,
First in beauty as in power,
Glory of the Christian nations,
Ready help in trouble's hour.
Though the gates of Hell against us,
With profoundest fury rage;
Though the ancient foe assault us,
And his fiercest battle wage.
Nought can hurt the pure in spirit,
Who upon thine aid rely;
At thy hand secure of gaining
Strength and mercy from on high
Through the everlasting ages,
Blessed Trinity, to Thee,
Father, Son, and Holy Spirit,
Praise and endless glory be