Strong H8319 שָׁרַק shâraq · to whistle

Isaiah

1. Isaiah 5:26
   And he will lift up an ensign to the nations from far, and will hiss unto them from the end of the earth: and, behold, they shall come with speed swiftly:
2. Isaiah 7:18
   And it shall come to pass in that day, that the Lord shall hiss for the fly that is in the uttermost part of the rivers of Egypt, and for the bee that is in the land of Assyria.