Deuteronomy 8:2-4

AKJV_Strongs(i)
  2 H2142 And you shall remember H3605 all H1870 the way H834 which H3068 the LORD H430 your God H3212 led H2088 you these H705 forty H8141 years H4057 in the wilderness, H6031 to humble H5254 you, and to prove H3045 you, to know H853 what H834 H3824 was in your heart, H8104 whether you would keep H4687 his commandments, H3808 or no.
  3 H6031 And he humbled H7456 you, and suffered you to hunger, H398 and fed H4478 you with manna, H834 which H3045 you knew H3808 not, neither H1 did your fathers H3045 know; H3045 that he might make you know H120 that man H2421 does not live H3899 by bread H905 only, H3605 but by every H4161 word that proceeds H6310 out of the mouth H3068 of the LORD H120 does man H2421 live.
  4 H8071 Your raiment H1086 waxed not old H3808 on you, neither H7272 did your foot H1216 swell, H2088 these H705 forty H8141 years.