New Living Translation
Why are you asking me this question? Ask those who heard me. They know what I said.”

American Standard Version
Why askest thou me? Ask them that have heard me , what I spake unto them: behold, these know the things which I said.

Berean Study Bible
Why are you asking Me? Ask those who heard My message. Surely they know what I said.”

Douay-Rheims Bible
Why asketh thou me? ask them who have heard what I have spoken unto them: behold they know what things I have said.

English Revised Version
Why askest thou me? ask them that have heard me, what I spake unto them: behold, these know the things which I said.

King James Bible
Why askest thou me? ask them which heard me, what I have said unto them: behold, they know what I said.

World English Bible
Why do you ask me? Ask those who have heard me what I said to them. Behold, these know the things which I said."

Young's Literal Translation
why me dost thou question? question those having heard what I spake to them; lo, these have known what I said.'

John 18:21 Additional Translations ...