"Ye are my witnesses, saith the LORD, and my servant whom I have chosen: that ye may know and believe me, and understand that I am he: before me there was no God formed, neither shall there be after me." (Isaiah 43:10)
"12I have declared, and have saved, and I have shewed, when there was no strange god among you: therefore ye are my witnesses, saith the LORD, that I am God. 13Yea, before the day was I am he; and there is none that can deliver out of my hand: I will work, and who shall let it?" (Isaiah 43:12,13)
"Fear ye not, neither be afraid: have not I told thee from that time, and have declared it ? ye are even my witnesses. Is there a God beside me? yea, there is no God; I know not any." (Isaiah 44:8)
"But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth." (Acts 1:8)