Read Deuteronomy 8:16 Using Other Translations
Who fed thee in the wilderness with manna, which thy fathers knew not, that he might humble thee, and that he might prove thee, to do thee good at thy latter end;
who fed you in the wilderness with manna that your fathers did not know, that he might humble you and test you, to do you good in the end.
He fed you with manna in the wilderness, a food unknown to your ancestors. He did this to humble you and test you for your own good.