Deuteronomy 8:14-16

14then your heart will 1become proud and you will 2forget the Lord your God who brought you out of the land of Egypt, out of the house of 3slavery;

15He who led you through 4the great and terrible wilderness, with its 5fiery serpents and scorpions, and its thirsty ground where there was no water; He who 6brought water for you out of the rock of flint.

16In the wilderness it was He who fed you manna 7which your fathers did not know, in order to humble you and in order to 8put you to the test, to do good for you 9in the end.