The purpose of the sword found in
Luke 22:36 was to fullfill prophesy.
And He said to them, “When I sent you out without money belt and bag and sandals, you did not lack anything, did you?” They said, “No, nothing.” And He said to them, “But now, whoever has a money belt is to take it along, likewise also a bag, and whoever has no sword is to sell his cloak and buy one. For I tell you that this which is written must be fulfilled in Me: ‘And He was counted with transgressors’; for that which refers to Me has its fulfillment.” They said, “Lord, look, here are two swords.” And He said to them, “It is enough.” (
Luke 22:35-38)
The events that took place at the Garden of Gethsemane were necessary so all prophecies concerning Him be fulfilled.
“For I tell you that this which is written must be fulfilled in Me, ‘And He was numbered with transgressors (Isaiah 53:12)’;
for that which refers to Me has its fulfillment.” (
Luke 22:37)
This is why Jesus replied with
"That's enough," when his disciples said,
“Lord, look here are two swords." (
Luke 22:38) Two swords were more than enough needed for that moment in the garden when Peter would draw his sword on one of the men who came to arrest Jesus. Jesus allowed Peter to do this in order to fulfill the prophecy that He would be
"numbered with transgressors."
So when Jesus said to Peter,
“Put your sword into the sheath. Shall I not drink the cup which My Father has given Me?” (
John 18:11) It was at this point the prophecy found in Isaiah,
"He was numbered with transgressors", had been fulfilled.