Acts 22:15

For thou shalt be his witness unto all men of what thou hast seen and heard.
— Acts 22:15, King James Version

In other translations

World English Bible (WEB)

For you will be a witness for him to all men of what you have seen and heard.

American Standard Version (ASV)

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

Young's Literal Translation (YLT)

because thou shalt be his witness unto all men of what thou hast seen and heard;