'River' in the Bible

Then Pharaoh commanded all his people, "All sons that are born you must throw into the river, but all daughters you may let live."

Then the daughter of Pharaoh came down to wash herself by the Nile, while her attendants were walking alongside the river, and she saw the basket among the reeds. She sent one of her attendants, took it,

I will set your boundaries from the Red Sea to the sea of the Philistines, and from the desert to the River, for I will deliver the inhabitants of the land into your hand, and you will drive them out before you.