'Testimony' in the Bible

Even as the testimony of Christ was confirmed in you:

And I, brethren, when I came to you, came not with excellency of speech or of wisdom, declaring unto you the testimony of God.

But if all prophesy [foretelling the future, speaking a new message from God to the people], and an unbeliever or outsider comes in, he is convicted [of his sins] by all, and he is called to account by all [because he can understand what is being said];

For [in this way] you can all prophesy one by one, so that everyone may be instructed and everyone may be encouraged;