The border of the Amorites was from the ascent of Akrabbim, from the rock and upward.
“the ascent of Akrabbim.” Literally, the ascent of the scorpions” (cp. Num. 34:4; Joshua 15:3). This is likely a slope out of the Zin Valley in the Negev southwest of the Dead Sea, going north.
“the rock.” This may be the name of a town in Edom.