Joshua 3:13

The soles of the feet of the priests. — Observe that the priests, the ark-bearers, did not stand in the middle of the bed of the river, but at the edge of the flood. They had no need to advance further. As soon as their feet “rested” in the overflow, “Jordan was driven back.” The waters descending from the north as it were recoiled and shrank away, and stood up in “one heap.”