Deuteronomy 32:3-5

New Catholic Bible

³ I will proclaim the name of the Lord,
    Oh, praise the greatness of our God.
⁴ He is a rock, his deeds are perfect,
    and all of his ways are just.
He is a God of truth who does no wrong;
    he is just and upright.
⁵ They have corrupted themselves,
    on account of their defect they are no longer his children,
    they are a perverse and crooked generation.