New Living Translation
So they finally replied, “We don’t know.” And Jesus responded, “Then I won’t tell you by what authority I do these things.

American Standard Version
And they answered Jesus, and said, We know not. He also said unto them, Neither tell I you by what authority I do these things.

Berean Study Bible
So they answered, “We do not know.” And Jesus replied, “Neither will I tell you by what authority I am doing these things.

Douay-Rheims Bible
And answering Jesus, they said: We know not. He also said to them: Neither do I tell you by what authority I do these things.

English Revised Version
And they answered Jesus, and said, We know not. He also said unto them, Neither tell I you by what authority I do these things.

King James Bible
And they answered Jesus, and said, We cannot tell. And he said unto them, Neither tell I you by what authority I do these things.

World English Bible
They answered Jesus, and said, "We don't know." He also said to them, "Neither will I tell you by what authority I do these things.

Young's Literal Translation
And answering Jesus they said, 'We have not known.' He said to them -- he also -- 'Neither do I tell you by what authority I do these things.

Matthew 21:27 Additional Translations ...