'Testify' in the Bible

He commanded us to preach to the people and to testify that this is he who is appointed by God as the Judge of the living and the dead.

All the prophets testify about him, that through his name everyone who believes in him will receive remission of sins."

But these things don't count; nor do I hold my life dear to myself, so that I may finish my race with joy, and the ministry which I received from the Lord Jesus, to fully testify to the Good News of the grace of God.

Therefore I testify to you this day that I am clean from the blood of all men,

As also the high priest and all the council of the elders testify, from whom also I received letters to the brothers, and traveled to Damascus to bring them also who were there to Jerusalem in bonds to be punished.

The following night, the Lord stood by him, and said, "Cheer up, Paul, for as you have testified about me at Jerusalem, so you must testify also at Rome."

having known me from the first, if they are willing to testify, that after the strictest sect of our religion I lived a Pharisee.