'Testimony of Jesus' in the Bible

I John, your brother and your companion in the distress and realm and patient endurance which Jesus brings, found myself in the island called Patmos, for adhering to God's word and the testimony of Jesus.

So, enraged at the woman, the dragon went off to wage war on the rest of her offspring, on those who keep God's commandments and hold the testimony of Jesus.

Then I fell before his feet to worship him; but he said to me, "No, not that! I am but a servant like yourself and your brothers, who hold the testimony of Jesus. Worship God" (for the testimony borne by Jesus is the breath of all prophecy).

And I saw thrones with people sitting on them, who were allowed to judge ??saw the souls of those who had been beheaded for the testimony of Jesus and God's word, those who would not worship the Beast or his statue, and who would not receive his mark on their forehead or hand; they came to life and reigned along with the Christ for a thousand years.