Fro in Isaiah
3 verses in Isaiah.
Isaiah 24:20The earth shall reel to and fro like a drunkard, and shall be removed like a cottage; and the transgression thereof shall be heavy upon it; and it shall fall, and not rise again.
Isaiah 33:4And your spoil shall be gathered like the gathering of the caterpiller: as the running to and fro of locusts shall he run upon them.
Isaiah 49:21Then shalt thou say in thine heart, Who hath begotten me these, seeing I have lost my children, and am desolate, a captive, and removing to and fro? and who hath brought up these? Behold, I was left alone; these, where had they been?