'Testify' in the Bible

This Jesus, God has raised to life-- a fact to which all of us testify.

To Him all the Prophets bear witness, and testify that through His name all who believe in Him receive the forgiveness of their sins."

For they all know me of old--if they would but testify to the fact--how, being an adherent of the strictest sect of our religion, my life was that of a Pharisee.