'Downstream' in the Bible

When the feet of the priests who carry the ark of the Lord, the Lord of all the earth, come to rest in the Jordan’s waters, its waters will be cut off. The water flowing downstream will stand up in a mass.”

and the water flowing downstream stood still, rising up in a mass that extended as far as Adam, a city next to Zarethan. The water flowing downstream into the Sea of the Arabah (the Dead Sea) was completely cut off, and the people crossed opposite Jericho.