“Then they laid hands
They seized him.”
οἱ δὲ ἐπέβαλαν τὰς χεῖρας αὐτῷ καὶ ἐκράτησαν αὐτόν.
This is similar to Matthew, chapter 26:50, but here in Mark, there was no conversation like in Matthew and the other gospel writers. In Luke, chapter 22:48-53, Jesus reprimanded Judas for betraying him, before he was seized. In John, chapter 18:4-11, there was a long dialogue of Jesus with those who came to get him, before he was arrested. Mark said that Jesus did not respond to Judas at all. They just put their hands upon him or grabbed Jesus (οἱ δὲ ἐπέβαλαν τὰς χεῖρας αὐτῷ). Then they seized or arrested Jesus without any kind of conversation at all (καὶ ἐκράτησαν αὐτόν).