'Testimony' in the Bible

And Jesus saith unto him, See thou tell no man; but go, show thyself to the priest, and offer the gift that Moses commanded, for a testimony unto them.

yea and before governors and kings shall ye be brought for my sake, for a testimony to them and to the Gentiles.

And this gospel of the kingdom shall be preached in the whole world for a testimony unto all the nations; and then shall the end come.