Still more for St. Michael and All Angels: Duo seraphim clamabant, Francisco Guerrero (1528-1599)

A gorgeous version of this motet sung by The Choir of Westminster Cathedral.



Here is the text and translation from CPDL; the texts come from Isaiah 6:3 and 1 John 5:7:

Duo seraphim clamabant alter ad alterum:
Sanctus Dominus Deus Saboath.
Plena est omnis terra gloria ejus.
Tres sunt, qui testimonium dant in coelo:
Pater, Verbum et Spiritus Sanctus:
et hi tres unum sunt.
Sanctus Dominus Deus Sabaoth.
Plena est omnis terra gloria ejus.

Two seraphim cried to one another:
Holy is the Lord God of Sabaoth.
The whole earth is full of his glory.
There are three who bear witness in heaven:
the Father, the Word, and the Holy Spirit:
and these three are one.
Holy is the Lord God of Sabaoth.
The whole earth is full of his glory.