Genesis 10:19

And the border of the Canaanites was from Sidon, as thou comest to Gerar, unto Gaza; as thou goest, unto Sodom, and Gomorrah, and Admah, and Zeboim, even unto Lasha.

1. The extent or borders of the Canaanite lands are given. Apparently, not all locations for these cities can be identified, but it came to be pretty much synonymous with current Israel.