New International Version
He denied it again, with an oath: "I don't know the man!"

American Standard Version
And again he denied with an oath, I know not the man.

Berean Study Bible
And again he denied it with an oath: “I do not know the man!”

Douay-Rheims Bible
And again he denied with an oath, I know not the man.

English Revised Version
And again he denied with an oath, I know not the man.

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

World English Bible
Again he denied it with an oath, "I don't know the man."

Young's Literal Translation
and again did he deny with an oath -- 'I have not known the man.'

Matthew 26:72 Additional Translations ...