Matthew 26:47-49
While he was still speaking, behold, Judas, one of the twelve, came, and with him a great multitude with swords and clubs, from the chief priests and elders of the people. Now he who betrayed him had given them a sign, saying, “Whoever I kiss, he is the one. Seize him.” Immediately he came to Jesus, and said, “Greetings, Rabbi!” and kissed him.