Matthew 26:48

ο δε παραδιδους αυτον εδωκεν αυτοις σημειον λεγων ον αν φιλησω αυτος εστιν κρατησατε αυτον

o de paradidoys ayton edōken aytois sēmeion legōn on an philēsō aytos estin kratēsate ayton

King James Version (KJV)

And forthwith he came to Jesus, and said, Hail, master; and kissed him.

Modern English

Now he who betrayed him gave them a sign, saying, “Whoever I kiss, he is the one. Seize him.”