Azmon
Azmon is a marker on the southern border of Canaan, named in two of the boundary descriptions that fix the land's southern edge — once in Numbers, when the territory is being mapped out before the conquest, and once in Joshua, when the same line is restated as Judah's southern boundary.
On the Southern Border in Numbers
The first mention places Azmon late in the southern arc of the land, after Kadesh-barnea, Hazar-addar, and the ascent of Akrabbim: "and your⁺ border will turn about southward of the ascent of Akrabbim, and pass along to Zin; and the goings out of it will be southward of Kadesh-barnea; and it will go forth to Hazar-addar, and pass along to Azmon; and the border will turn about from Azmon to the brook of Egypt, and the goings out of it will be at the sea" (Num 34:4-5). The line passes through Azmon on its way to the brook of Egypt and out to the sea.
On Judah's South Border in Joshua
The Joshua description restates the same line as the southern edge of Judah's allotment, again locating Azmon between the inland descriptors and the brook of Egypt: "and it passed along to Azmon, and went out at the brook of Egypt; and the goings out of the border were at the sea: this will be your⁺ south border" (Jos 15:4).
The two passages match at every named point — Azmon, the brook of Egypt, the sea — so that the place functions as a fixed survey-marker on the same southern boundary across both texts.