Mark 15:16-19

The soldiers led Him away into the palace (that is, the Praetorium), and they called together the entire [Roman] battalion [of 600 soldiers]. [Matt 27:27-31] They dressed Him up in [a ranking Roman officer’s robe of] purple, and after twisting [together] a crown of thorns, they placed it on Him; and they began saluting and mocking Him: “Hail, King of the Jews!” They kept beating Him on the head with a reed and spitting on Him, and kneeling and bowing in [mock] homage to Him. [Is 50:6]