Forgat; not historically, but practically. They did not so remember them, as to love, and serve, and trust that God of whose infinite power and goodness they had such ample experience. Words of knowledge, such as knowing, remembering, &c., in Scripture use frequently comprehend affection and practice, as hath been oft observed.
Related Commentaries of Psalms 78:11
Psalms 78:11
11 And forgat his works, and his wonders that he had shewed them.