Deu 2:1-7 “Then we turned and journeyed into the wilderness in the direction of the Red Sea, as the LORD told me. And for many days we traveled around Mount Seir. Then the LORD said to me, ‘You have been traveling around this mountain country long enough. Turn northward and command the people, “You are about to pass through the territory of your brothers, the people of Esau, who live in Seir; and they will be afraid of you. So be very careful. Do not contend with them, for I will not give you any of their land, no, not so much as for the sole of the foot to tread on, because I have given Mount Seir to Esau as a possession. You shall purchase food from them with money, that you may eat, and you shall also buy water from them with money, that you may drink. For the LORD your God has blessed you in all the work of your hands. He knows your going through this great wilderness. These forty years the LORD your God has been with you. You have lacked nothing.”’
And we compassed mount Seir many days. These “many days” are the thirty-eight years during which the people wandered in the wilderness before they camped the second time at Kadesh; their going round Mount Seir. (Unknown)
The descendants of Esau were distant relatives to the people of Israel (400 years earlier, the brother of Jacob was Esau). God didn’t want Israel to take the land that He gave to Esau and his descendants. Perhaps the most famous Edomite in the New Testament was Herod the Great. He was hated by the Jews because he was an Edomite, but he wanted to be received and respected as a Jew. Israel was not just some conquering army, out to get whatever land it could take. It probably was strong enough to simply take the land of Edom, but Israel only received what God had promised to them. God commanded Israel to treat the Edomites with respect, even though they could have dominated them as a stronger nation. How we treat those weaker than ourselves is always a good measure of character. When we have the capability to dominate or abuse others and do not, it shows that we have good character. For some of these reasons, God commanded Israel to treat the weaker nation of Edom well. (Guzik)
Only a short account of the long stay of Israel in the wilderness is given. God not only chastised them for their murmuring and unbelief, but prepared them for Canaan; by humbling them for sin, teaching them to mortify their lusts, to follow God, and to comfort themselves in him. Though Israel may be long kept waiting for deliverance and enlargement, it will come at last. Before God brought Israel to destroy their enemies in Canaan, he taught them to forgive their enemies in Edom. They must not, under pretence of God’s covenant and conduct, think to seize all they could lay hands on. Dominion is not founded in grace. God’s Israel shall be well placed, but must not expect to be placed alone in the midst of the earth. Religion must never be made a cloak for injustice. Scorn to be beholden to Edomites, when thou hast an all-sufficient God to depend upon. Use what thou hast, use it cheerfully. Thou hast experienced the care of the Divine providence, never use any crooked methods for thy supply. All this is equally to be applied to the experience of the believer. (Henry)