פּירוש אויף דברים 2:8

ונפן ונעבר AND WE TURNED AND PASSED, towards the north; we turned our faces to proceed along the eastern side (see Rashi on v. 3).

ונעבור מאת אחינו, “we passed by our brethren, etc.” they did so by turning northward as they had been commanded in verse 3. Their point of departure was Ovot. This is why there is a most unusual end of paragraph mark (letter ס plus two blank spaces in our chumashim, in the middle of a sentence.)

ונעבר מאת אחינו בני עשו, "we passed by from our brethren the children of Esau, etc." The reason Moses stresses the brotherly relations with Esau is to remind the Israelites that the Jewish people had abided by G'd's command not to cause any friction or provocation in their dealings with the Edomites. Another reason why Moses refers to them as "our brothers" was because they maintained correct relations with the Israelites, selling them whatever produce the Israelites were willing to buy. We know this from verse 29 in our chapter.