Matthew 26:47-49 NIV

[47] While he was still speaking, Judas, one of the Twelve, arrived. With him was a large crowd armed with swords and clubs, sent from the chief priests and the elders of the people. [48] Now the betrayer had arranged a signal with them: “The one I kiss is the man; arrest him.” [49] Going at once to Jesus, Judas said, “Greetings, Rabbi!” and kissed him.