Mark 14:43

εὐθὺς, etc. (ἰδοὺ in Mt.), straightway, even while He is speaking, appears Judas, who is carefully defined by surname and position as one of the Twelve. At what point of time the traitor left the company on his nefarious errand is not indicated. According to Weiss (in Meyer) the evangelist conceives of Judas as going with the rest to Gethsemane and stealing away from the nine, after the three had been taken apart, having now satisfied himself as to the Master's whereabouts. παρὰ τ. ἀρχ., etc.: παρὰ goes along with παραγίνεται, and implies that Judas and those with him had an official commission from the authorities, the three classes of whom are carefully specified.