Judas was about to deceptively turn Jesus in to the authorities. Jesus told his disciples to prepare. In the past when they traveled, it was without a sword, telling others about the Gospel. But now Jesus told them to get a sword. Prophetic words from the Old Testament saying they would call Jesus a rebel would be fulfilled.

Luke 22 ~

³⁵ Then Jesus asked them, “When I sent you out to preach the Good News and you did not have money, a traveler’s bag, or an extra pair of sandals, did you need anything?”

“No,” they replied.

³⁶ “But now,” he said, “take your money and a traveler’s bag. And if you don’t have a sword, sell your cloak and buy one! ³⁷ For the time has come for this prophecy about me to be fulfilled: ‘He was counted among the rebels.’^[a] Yes, everything written about me by the prophets will come true.”

³⁸ “Look, Lord,” they replied, “we have two swords among us.”

“That’s enough,” he said.

³⁹ Then, accompanied by the disciples, Jesus left the upstairs room and went as usual to the Mount of Olives. ⁴⁰ There he told them, “Pray that you will not give in to temptation.”

⁴¹ He walked away, about a stone’s throw, and knelt down and prayed,⁴² “Father, if you are willing, please take this cup of suffering away from me. Yet I want your will to be done, not mine.” ⁴³ Then an angel from heaven appeared and strengthened him. ⁴⁴ He prayed more fervently, and he was in such agony of spirit that his sweat fell to the ground like great drops of blood.^[b]

⁴⁵ At last he stood up again and returned to the disciples, only to find them asleep, exhausted from grief.⁴⁶ “Why are you sleeping?” he asked them. “Get up and pray, so that you will not give in to temptation.”