Matthew 26:73

And after a little, those who stood there, coming to him, said to Peter, Truly thou too art of them, for also thy speech makes thee manifest.

Judges 12:6

they said to him, "Then say Shibboleth," and he said, "Sibboleth," for he could not pronounce it right; then they seized him and slew him at the fords of the Jordan. And there fell at that time forty-two thousand of the E'phraimites.

Nehemiah 13:24

And their children spoke half in the language of Ashdod, and could not speak in the Jews' language, but according to the language of each people.

Luke 22:59-60

And after the lapse of about one hour another stoutly maintained it, saying, In truth this man also was with him, for also he is a Galilaean.

John 18:26-27

One of the bondmen of the high priest, who was kinsman of him whose ear Peter cut off, says, Did not I see thee in the garden with him?

Treasury of Scripture Knowledge

Summary

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.

General references

Bible References

Surely

Luke 22:59
And after the lapse of about one hour another stoutly maintained it, saying, In truth this man also was with him, for also he is a Galilaean.
John 18:26
One of the bondmen of the high priest, who was kinsman of him whose ear Peter cut off, says, Did not I see thee in the garden with him?

For

Judges 12:6
they said to him, "Then say Shibboleth," and he said, "Sibboleth," for he could not pronounce it right; then they seized him and slew him at the fords of the Jordan. And there fell at that time forty-two thousand of the E'phraimites.
Nehemiah 13:24
And their children spoke half in the language of Ashdod, and could not speak in the Jews' language, but according to the language of each people.

General references

Proverbs 25:26
A troubled fountain, and a defiled well, is a righteous man that giveth way before the wicked.