Deuteronomy 32:3-5

3 For I will proclaim the name of LORD. Ascribe ye greatness to our God.

4 The Rock, his work is perfect, for all his ways are justice, a God of faithfulness and without iniquity, just and right is he.

5 They have dealt corruptly with him. They are not his sons, it is their blemish, a perverse and crooked generation.