'Lash' in the Bible

the commanding officer ordered Paul to be brought back into the barracks. He told them to interrogate Paul by beating him with a lash so that he could find out the reason the crowd was shouting at Paul in this way.

As they stretched him out for the lash, Paul said to the centurion standing by, “Is it legal for you to scourge a man who is a Roman citizen and is uncondemned?”