ובשעיר ישבו החורים, "and the Chorim used to live in the region of Se-ir.⁠" The same considerations that are responsible for the Israelites not being allowed to make war or even harass the Moabites, (although their lands were on their route to the Holy Land, even) also are the ones why they must not at this time encroach on the land of Edom. That land had at one time been the land of the Chorites, who were identical with the tribe Chivi, mentioned in chapter 15 of Genesis above. Esau, Avraham's grandson, had received it as a sort of dowry when he married the great-grand-daughter daughter of Tzivon, a prominent Canaanite belonging to that tribe. (Genesis 36,2) Tzivon, as mentioned there, was a son of the original Se-ir.

It is possible that the reason why the Torah refers to that tribe as Chivi, was because in that neighborhood there was a type of snake by that name that the people had to be on guard against. Various types of snakes including one by that name are referred to in Isaiah 11,8 where the lair חור of certain types of snakes such as פתן is mentioned. Compare especially Genesis 49,17 נחש עלי דרך. It is not unusual, historically, to find that names of certain places, landmarks and such, reflect a past association with some animal. Certain letters underwent repositioning when such places or animals were named. What was known as חוי may have been changed to חורי, so that the tribe known as חורי in the days of Avraham may have become the חווי in the days of his grandson Eau, or vice versa. During Avraham's time these people lived in what later became known as Se-ir. It was most certainly something miraculous that the relatively few descendants of Esau should have dispossessed a far more numerous and well entrenched tribe. Moses may have referred to all these details to underline that possession of the descendants of Esau, Edom had been divinely assisted when settling in that region. It would not do to attack them, the time was not ripe for this in God's timetable. God would retaliate against people who deprive others of their homeland unless instructed by Him to do so. He does likewise to nations who dispossess Israel of its ancestral heritage without having been bidden by Him to do so. This may be why Moses says כאשר עשה ישראל meaning as "Israel is going to do to Esau,⁠" i.e. in the future, seeing that up until then Israel had not done any of this. [When God has promised, He will keep His promise, so that the promise by God that Israel would dispossess the Canaanites is described as fact rather than mere hope or even expectation. Ed.] Moses makes similar reference to the land of the Ammonites,