Deuteronomy 2:14-16

14The time we spent traveling from Kadesh-barnea until we crossed over the Brook of Zered was thirty-eight years, until that entire generation of fighting men had perished from the camp, as the LORD had sworn to them. 15Indeed, the LORD’s hand was against them, to eliminate them from the camp, until they had all perished.

16Now when all the fighting men among the people had died,