Mark 14:70

But he again denied it. After a little while again those who stood by said to Peter, "You truly are one of them, for you are a Galilean, and your speech shows it."

Acts 2:7

They were all amazed and marveled, saying to one another, "Behold, aren't all these who speak Galileans?

then they said to him, "Now say 'Shibboleth;'" and he said "Sibboleth;" for he couldn't manage to pronounce it right: then they laid hold of him, and killed him at the fords of the Jordan. At that time, forty-two thousand of Ephraim fell.

Matthew 26:73-74

After a little while those who stood by came and said to Peter, "Surely you are also one of them, for your speech makes you known."

Mark 14:68

But he denied it, saying, "I neither know, nor understand what you are saying." He went out on the porch, and the rooster crowed.

Luke 22:59-60

After about one hour passed, another confidently affirmed, saying, "Truly this man also was with him, for he is a Galilean!"

John 18:26-27

One of the servants of the high priest, being a relative of him whose ear Peter had cut off, said, "Didn't I see you in the garden with him?"

Treasury of Scripture Knowledge

Summary

Mark 14:70

And he denied it again. And a little after, they that stood by said again to Peter, Surely thou art one of them: for thou art a Galilaean, and thy speech agreeth thereto.