A.T. Robertson Commentary Mark 14:41

"And he cometh the third time, and saith unto them, Sleep on now, and take your rest: it is enough; the hour is come; behold, the Son of man is betrayed into the hands of sinners." — Mark 14:41 (ASV)

It is enough (απεχε). Alone in Mark. This impersonal use is rare and has puzzled expositors no little. The papyri (Deissmann's Light from the Ancient East and Moulton and Milligan's Vocabulary) furnish many examples of it as a receipt for payment in full. See also Mt 6:2ff.; Luke 6:24; Php 4:18 for the notion of paying in full. It is used here by Jesus in an ironical sense, probably meaning that there was no need of further reproof of the disciples for their failure to watch with him. "This is no time for a lengthened exposure of the faults of friends; the enemy is at the gate" (Swete). See further on Mt 26:45 for the approach of Judas.