Genesis 20:1

And Abraham journeyed from thence toward the south country, and dwelled between Kadesh and Shur, and sojourned in Gerar. From the grove of Mamre at or near Hebron Abraham gradually journeyed, with all his possessions, to the extreme southern part of Canaan, very likely in search of better pasturage. The region where he tented was, roughly speaking, between Kadesh and Shur, and in his wanderings he encamped also at Gerar, in the land of the Philistines.