The verbs in the first clause should be in the present, But he, the compassionate, forgives iniquity, and doth not destroy, and many a time he turned away, &c.
Related Commentaries of Psalms 78:38
Psalms 78:38
38 But he, being full of compassion, forgave their iniquity, and destroyed them not: yea, many a time turned he his anger away, and did not stir up all his wrath.