Berean Study Bible
You will be His witness to everyone of what you have seen and heard.

King James Bible
For thou shalt be his witness unto all men of what thou hast seen and heard.

American Standard Version
For thou shalt be a witness for him unto all men of what thou hast seen and heard.

Darby Bible Translation
for thou shalt be a witness for him to all men of what thou hast seen and heard.

Douay-Rheims Bible
For thou shalt be his witness to all men, of those things which thou hast seen and heard.

English Revised Version
For thou shalt be a witness for him unto all men of what thou hast seen and heard.

Young's Literal Translation
because thou shalt be his witness unto all men of what thou hast seen and heard;