Matthew 26:47-49

And even as Jesus said this, Judas, one of the twelve disciples, arrived with a crowd of men armed with swords and clubs. They had been sent by the leading priests and elders of the people. The traitor, Judas, had given them a prearranged signal: “You will know which one to arrest when I greet him with a kiss.” So Judas came straight to Jesus. “Greetings, Rabbi!” he exclaimed and gave him the kiss.