The words of this song are from a song Moses sang (with Joshua) in Deuteronomy 32. The lyrics are from verse 3 and 4, though Moses' song is in verse 1 through 43.
Deuteronomy 32:3-4
3 Because I will publish the name of the LORD: ascribe ye greatness unto our God.
4 He is the Rock, his work is perfe...
A God of faithfulness without injustice
Good and upright is He
A God of faithfulness without injustice
Good and upright is He
Ascribe greatness to our God, the Rock
His work is perfect
And all His ways are just
Ascribe greatness to our God, the Rock
His work is perfect
And all His ways are just
Dios de verdad, sin injusticia
Bueno y recto es él
Dios de verdad, sin injusticia
Bueno y recto es él
Engrandeced a nuestro Dios, la Roca
Su trabajo es perfecto
Y todos sus caminos son justos
Engrandeced a nuestro Dios, la Roca
Su trabajo es perfecto
Y todos sus caminos son justos