'Testimony' in the Bible

who testified and gave supporting evidence to the word of God and to the testimony of Jesus Christ, even to everything that he saw [in his visions].

I, John, your brother and companion in the tribulation and kingdom and patient endurance which are in Jesus, was on the island called Patmos, [exiled there] because of [my preaching of] the word of God [regarding eternal salvation] and the testimony of Jesus Christ.

When He (the Lamb) broke open the fifth seal, I saw underneath the altar the souls of those who had been slaughtered because of the word of God, and because of the testimony which they had maintained [out of loyalty to Christ].

When they have finished their testimony and given their evidence, the beast that comes up out of the abyss (bottomless pit) will wage war with them, and overcome them and kill them.

And they overcame and conquered him because of the blood of the Lamb and because of the word of their testimony, for they did not love their life and renounce their faith even when faced with death.

So the dragon was enraged with the woman, and he went off to wage war on the rest of her children (seed), those who keep and obey the commandments of God and have the testimony of Jesus [holding firmly to it and bearing witness to Him].

After these things I looked, and the temple (sanctuary) of the tabernacle of the testimony in heaven was opened,

Then I fell down at his feet to worship him, but he [stopped me and] said to me, “You must not do that; I am a fellow servant with you and your brothers and sisters who have and hold the testimony of Jesus. Worship God [alone]. For the testimony of Jesus is the spirit of prophecy [His life and teaching are the heart of prophecy].”