Matthew 26:73
"And after a while came unto him they that stood by, and said to Peter, Surely thou also art one of them; for thy speech bewrayeth thee."
Cross References (ranked by relevance)
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.
Nehemiah 13:24
And their children spake half in the speech of Ashdod, and could not speak in the Jews’ language, but according to the language of each people.