Matthew 26:73

A little later the bystanders came up and said to Peter, "You also are certainly one of them, for your speech betrays you."

Luke 22:59-60

But an hour afterwards another man kept insisting, saying. "Really, this fellow was with him. Why, he is a Galilean."

John 18:26-27

One of the slaves of the high priest, a relative of the man whose ear Peter had cut off, said, "Did not I myself see you with him in the garden."

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
But an hour afterwards another man kept insisting, saying. "Really, this fellow was with him. Why, he is a Galilean."
John 18:26
One of the slaves of the high priest, a relative of the man whose ear Peter had cut off, said, "Did not I myself see you with him in the garden."