With a reed.
They knelt down
In homage to him.”
καὶ ἔτυπτον αὐτοῦ τὴν κεφαλὴν καλάμῳ καὶ ἐνέπτυον αὐτῷ, καὶ τιθέντες τὰ γόνατα προσεκύνουν αὐτῷ.
This is almost word for word in Matthew, chapter 27:30, but not in Luke. In John, chapter 19:3, there is something similar. Mark said that these Roman soldiers kept striking him on the head (καὶ ἔτυπτον αὐτοῦ τὴν κεφαλὴν) with a reed or stick (καλάμῳ). Then they spat on Jesus (καὶ ἐνέπτυον αὐτῷ). Finally, these Roman soldiers bent their knees (καὶ τιθέντες τὰ γόνατα) and knelt before him (προσεκύνουν αὐτῷ as they were mockingly paying homage to this pretended king of the Jews.