Luke 22:59

About an hour later, another man insisted, "This man was certainly with him too, for he is a Galilean!"

Matthew 26:73-74

A little while after the bystanders came up to Peter and said, "You are certainly one of them too, for your accent shows it!"

Mark 14:69-70

And the maid saw him there and began again to tell the bystanders, "This fellow is one of them!"

John 18:26-27

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

Treasury of Scripture Knowledge

Summary

And about the space of one hour after another confidently affirmed, saying, Of a truth this fellow also was with him: for he is a Galilaean.

Bible References

Confidently

Matthew 26:73
A little while after the bystanders came up to Peter and said, "You are certainly one of them too, for your accent shows it!"
Mark 14:69
And the maid saw him there and began again to tell the bystanders, "This fellow is one of them!"
John 18:26
One of the high priest's slaves, a relative of the man whose ear Peter had cut off, said, "Did I not see you with him in the garden?"