פּירוש אויף במדבר 34:4

ונסב לכם הגבול מנגב למעלה עקרבים — AND YOUR BORDER SHALL TURN ABOUT SOUTHWARD OF THE ASCENT OF AKRABBIM - In every passage in this chapter where it says ונסב or ויצא, it tells us that the boundary line was not straight (i.e., did not continue in the same straight line) but in proceeding it projected outside this straight line. Here, the word means that the boundary line left the straight line and bent towards the north of the world (in a northerly direction) diagonally towards the west, and the boundary line passed by the south of the Ascent of Akrabbim. Consequently the Ascent of Akrabbim was within the boundary (cf. Rashi on Joshua 15:3).

ונסב לכם, at this point the boundary projects somewhat.

ועבר צנה והיה תוצאותיו וגו, “and once having passed Tzinah, it will extend southward, etc.”

ועבר צנה IT SHALL PASS ALONG TO ZIN — צנה is the same as אל צין “to Zin”, like מצרימה "to Egypt".