Sforno on Deuteronomy 32:20/ספורנו על דברים ל״ב:כ׳

1אסתירה פני מהם, from the sons and daughters.

2אראה מה אחריתם, because I can foresee that there is no chance that they will become penitents.

3כי דור תהפוכות המה for they have thoroughly turned their hearts away from the path of the living G’d;

4בנים לא אמון בם, completely faithless children who had not learned from their fathers any true values in life.