Joshua 13:3
From Sihor, which is before Egypt, even unto the borders of Ekron northward, which is counted to the Canaanite: five lords of the Philistines; the Gazathites, and the Ashdothites, the Eshkalonites, the Gittites, and the Ekronites; also the Avites:

Isaiah 23:3
And by great waters the seed of Sihor, the harvest of the river, is her revenue; and she is a mart of nations.

Jeremiah 2:18
And now what hast thou to do in the way of Egypt, to drink the waters of Sihor? or what hast thou to do in the way of Assyria, to drink the waters of the river?