8 They would not be like their ancestors— a stubborn and rebellious generation, whose hearts were not loyal to God, whose spirits were not faithful to him.

Read Psalm 78:8 Using Other Translations

And might not be as their fathers, a stubborn and rebellious generation; a generation that set not their heart aright, and whose spirit was not stedfast with God.
and that they should not be like their fathers, a stubborn and rebellious generation, a generation whose heart was not steadfast, whose spirit was not faithful to God.
Then they will not be like their ancestors— stubborn, rebellious, and unfaithful, refusing to give their hearts to God.