Deuteronomy 2:7, 14

For the LORD thy God hath blessed thee in all the works of thy hand: he knoweth thy walking through this great wilderness: these forty years the LORD thy God hath been with thee; thou hast lacked nothing.

And the space in which we came from Kadesh-barnea, until we were come over the brook Zered, was thirty and eight years; until all the generation of the men of war were wasted out from among the host, as the LORD sware unto them.