Matthew 26:73

Verily thou also art one of them, for thy speech discovers thee:

Luke 22:59-60

And about an hour after, another confidently affirmed saying, In truth this fellow also was with Him; for he is a Galilean too: but Peter answered,

John 18:26-27

Then said one of the servants of the high-priest, kinsman to him whose ear Peter cut off, 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.

Bible References

Surely

Luke 22:59
And about an hour after, another confidently affirmed saying, In truth this fellow also was with Him; for he is a Galilean too: but Peter answered,
John 18:26
Then said one of the servants of the high-priest, kinsman to him whose ear Peter cut off, Did not I see thee in the garden with Him?