On the south side it will run from Tamar to the waters of Meribath-kadesh, and along the Brook of Egypt to the Great Sea. This will be the southern boundary.
KJV
And the south side southward, from Tamar [even] to the waters of strife [in] Kadesh, the river to the great sea. And [this is] the south side southward.
ASV
And the south side southward shall be from Tamar as far as the waters of Meriboth-kadesh, to the brook of Egypt, unto the great sea. This is the south side southward.