Deuteronomy 2:14; Deuteronomy 34:8

14 "Now the time that it took for us to come from Kadesh-barnea until we crossed over the brook Zered was thirty-eight years, until all the generation of the men of war perished from within the camp, as the LORD had sworn to them.

8 So the sons of Israel wept for Moses in the plains of Moab thirty days; then the days of weeping and mourning for Moses came to an end.