Genesis 15:18
In the same day the LORD made a covenant with Abram, saying, To your seed have I given this land, from the river of Egypt to the great river, the river Euphrates:
Torrey's Topical Textbook—AKJV

Deuteronomy 1:7
Turn you, and take your journey, and go to the mount of the Amorites, and to all the places near thereunto, in the plain, in the hills, and in the vale, and in the south, and by the sea side, to the land of the Canaanites, and to Lebanon, to the great river, the river Euphrates.
Torrey's Topical Textbook—AKJV