NAS: 'For you will be a witness for Him to all men of what you have seen and heard.
KJV: For thou shalt be his witness unto all men of what thou hast seen and heard.
GWT: You will be his witness and will tell everyone what you have seen and heard.
ASV: For thou shalt be a witness for him unto all men of what thou hast seen and heard.
BBE: For you will be a witness for him to all men of what you have seen and of what has come to your ears.
DBY: for thou shalt be a witness for him to all men of what thou hast seen and heard.
DRB: For thou shalt be his witness to all men, of those things which thou hast seen and heard.
WBS: For thou shalt be his witness to all men of what thou hast seen and heard.
WEB: For you will be a witness for him to all men of what you have seen and heard.
YLT: because thou shalt be his witness unto all men of what thou hast seen and heard;