'Upstream' in the Bible

When the soles of the feet of the priests carrying the ark of Yahweh, Lord of all the earth, rest in the waters of the Jordan, the waters of the Jordan will be cut off {upstream}, and they will stand [still in] one heap.

the water coming downstream toward them stopped flowing. It piled up far upstream at Adam (the city near Zarethan); there was no water at all flowing to the sea of the Arabah (the Salt Sea). The people crossed the river opposite Jericho.