Deuteronomy 8:1-3

Young's Literal Translation

8 `All the command which I am commanding thee to-day ye observe to do, so that ye live, and have multiplied, and gone in, and possessed the land which Jehovah hath sworn to your fathers;

² and thou hast remembered all the way which Jehovah thy God hath caused thee to go these forty years in the wilderness, in order to humble thee to try thee, to know that which [is] in thy heart, whether thou dost keep His commands or not.

³ `And He doth humble thee, and cause thee to hunger and doth cause thee to eat the manna (which thou hast not known, even thy fathers have not known), in order to cause thee to know that not by bread alone doth man live, but by every produce of the mouth of Jehovah man doth live.