'Blow' in the Bible

Then Elijah took off his robe, and, rolling it up, gave the water a blow with it, and the waters were parted, flowing back this way and that, so that they went over on dry land.

And he took Elijah's robe, which had been dropped from him, and giving the water a blow with it, said, Where is the Lord, the God of Elijah? and at his blow the waters were parted this way and that; and Elisha went over.