Matthew 26:72

but he denied it again, and swore I don't know the man.

Matthew 5:34-36

but I say unto you, swear not at all; neither by heaven, for it is God's throne:

Matthew 26:74

then he fell to solemn imprecations, and swore, "I don't know the man." and immediately the cock crew:

Luke 22:34

but Jesus said, before the cock proclaims the day, you will thrice deny that ever you knew me.

Acts 5:3-4

upon which Peter said, Ananias, how could satan inspire thine heart to lye to the holy ghost, and to keep back part of the price of the land?

Treasury of Scripture Knowledge

Summary

And again he denied with an oath, I do not know the man.

Bible References

With

Matthew 5:34
but I say unto you, swear not at all; neither by heaven, for it is God's throne:
Acts 5:3
upon which Peter said, Ananias, how could satan inspire thine heart to lye to the holy ghost, and to keep back part of the price of the land?

I do not

Matthew 26:74
then he fell to solemn imprecations, and swore, "I don't know the man." and immediately the cock crew:
Luke 22:34
but Jesus said, before the cock proclaims the day, you will thrice deny that ever you knew me.