As the children of Esau did They did permit them to pass quietly by the borders, though not through the heart of their land, and in their passage the people sold them meat and drink, being, it seems, more kind to them than their king would have had them; and therefore they here ascribe this favour not to the king, though they are now treating with a king, but to the people, the children of Esau. Hardened his spirit That is, suffered it to be hardened.
Related Commentaries of Deuteronomy 2:29
Deuteronomy 2:29-30
29 (As the children of Esau which dwell in Seir, and the Moabites which dwell in Ar, did unto me;) until I shall pass over Jordan into the land which the LORD our God giveth us.
30 But Sihon king of Heshbon would not let us pass by him: for the LORD thy God hardened his spirit, and made his heart obstinate, that he might deliver him into thy hand, as appeareth this day.