Rashi on Deuteronomy 3:17/רש"י על דברים ג׳:י״ז

1מכנרת FROM CHINNERETH — This is on the western side of Jordan. The inheritance of the children of Gad was in the east side of the Jordan, and there fell as their lot the width of the Jordan, adjoining their territory, and in addition, land on its opposite bank up to Chinnereth. This is the meaning of what is said here, "And the Jordan and the territory thereof”, i.e. the Jordan and some land on its opposite bank.