'Testimony' in the Bible

And Jesus said to him, “See that you tell no one [about this]; but go, show yourself to the priest [for inspection] and present the offering that Moses commanded, as a testimony (evidence) to them [of your healing].”

and you will be brought before governors and kings for My sake, as witnesses to them and to the Gentiles.

But if he does not listen, take along with you one or two others, so that every word may be confirmed by the testimony of two or three witnesses.

This good news of the kingdom [the gospel] will be preached throughout the whole world as a testimony to all the nations, and then the end [of the age] will come.