Old Testament

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.

I, even I, am the LORD; and beside me there is no saviour. 

I 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.

Yea, 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 (reverse) it?                             Isaiah 43:10-13

New Testament

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

Neither is there salvation in any other: for there is none other name                  under heaven given among men, whereby we must be saved.               Acts 4:12

…let the word of Christ dwell in you richly…