'River' in the Bible

So Solomon kept the feast at that time for seven days, and all Israel with him, a very great meeting, for the people had come together from the way into Hamath and from as far as the river of Egypt.

And he was ruler over all the kings from the River to the land of the Philistines, as far as the limit of Egypt.

After all this, and after Josiah had put the house in order, Neco, king of Egypt, went up to make war at Carchemish by the river Euphrates; and Josiah went out against him.