Deuteronomy 2:7, 14

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

And the days in which we came from Kadesh-barnea, until we were come over the brook Zered, were thirty and eight years; until all the generation of the men of war were consumed from the midst of the camp, as Jehovah sware unto them.