The 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.
It is observable here that Moses, speaking of the Edomites (Deu 2:8), calls them, "our brethren, the children of Esau." Though they had been unkind to Israel, in refusing them a peaceable passage through their country, yet he calls them brethren.
Commenting on Deuteronomy 2:8-23
And the space in which we came from Kadeshbarnea,.... The space of time; or, "the days" (b); the number of them: until we were come over the brook Zered, was thirty and eight years; that is, from the time that the spies were sent and searched the land, and brought a report of it; for they were sent from Kadeshbarnea, Num 32:8 unto the passage...
And the space in which we came from Kadeshbarnea, 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. (g) He shows by this, that as God is true in his promise, so his threatenings are not in vain.