Mark 14:44
Now he that was betraying Him gave them a signal, saying, "Whomsoever I shall kiss, This is He, take Him, and lead Him away securely."
Matthew 26:48-50
And he who was betraying Him gave them a sign, saying, "Whomsoever I kiss, He it is; seize Him."
Acts 16:23
and, having laid upon them many stripes, they thrust them into prison, charging the jailer to keep them safely;
Philippians 1:28
and in nothing terrified by the adversaries; which, indeed, to them is a token of destruction, but of your salvation, and this from God;
2 Thessalonians 3:17
The salutation of Paul with my own hand, which is a sign in every letter; so I write.