Deuteronomy 8:16
Book: Deuteronomy 8
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:
Ecclesiastes 2:19
Book: Ecclesiastes 2
And who knoweth whether he will be a wise man or a fool? yet will he have rule over all my labor wherein I have labored, and wherein I have showed myself wise under the sun. This also is vanity.