'Thongs' in the Bible

Is not this the fast which I have chosen: to loose the bands of wickedness, to undo the thongs of the yoke, and to send forth free the crushed, and that ye break every yoke?

But as they stretched him forward with the thongs, Paul said to the centurion who stood by, Is it lawful for you to scourge a man who is a Roman and uncondemned?