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."
Cross References (ranked by relevance)
Acts 2:7
And they were all amazed and marvelled, saying one to another, Behold, are not all these which speak Galilaeans?
Mark 14:68
But he denied, saying, I know not, neither understand I what thou sayest. And he went out into the porch; and the cock crew.
Judges 12:6
Then said they unto him, Say now Shibboleth: and he said Sibboleth: for he could not frame to pronounce it right. Then they took him, and slew him at the passages of Jordan: and there fell at that time of the Ephraimites forty and two thousand.