Adam Clarke on Psalms 80:11

She sent out her boughs unto the sea and her branches unto the river - The Israelitish empire extended from the River Euphrates on the east to the Mediterranean Sea on the west, and from the same Euphrates on the north of the promised land to its farthest extent on the south; Syria bounding the north, and Arabia and Egypt the south. And this was according to the promises which God had made to the fathers, Exo 23:31; Deu 11:24.