He makes it clear that utility is the only standard of morality, in his view, so he's not challenging Bentham's premise. He's affirming it.

明确指出功利是道德的唯一标准，在他看来，他并没有质疑边沁的前提，而是肯定此观点。

耶鲁公开课 - 公正课程节选

And human morality is conformity to his will.

人类的美德与上帝的意愿相符合。

耶鲁公开课 - 旧约导论课程节选