The other evangelists also mention a reed put into his right hand. The crown, and the purple robe, and a sceptre, are all regal ensigns; they give them to Christ in derision of his pretence to a kingdom, and in the mean time themselves proclaim what he had said, that his kingdom was not of this world; for though earthly kings wear crowns, yet they use to be of gold, not of thorns; and their sceptres use to be gold, not reeds.
Related Commentaries of John 19:2
John 19:2
2 And the soldiers platted a crown of thorns, and put it on his head, and they put on him a purple robe,