John Wesley on Joshua 12:3

On the east - Which words describe the situation not of the sea of Cinneroth, which was part of the western border of Sihon's dominion, but of the plain, which is here said to lie eastward from the sea of Cinneroth, and also eastward from the salt sea. And this was indeed the situation of the plains of Moab, which are here spoken of; they lay between the two seas, that of Cinneroth and the salt sea, and eastward to them both. Sea of the plain - The salt sea was a famous plain, pleasant and fruitful, before it was turned into a sea.