'Bearing Witness' in the Bible

So the people, who were with Him when He called Lazarus out of the tomb and raised him from the dead, continued to tell others about Him.

This is the same disciple who is testifying to these things and has recorded them; and we know [without any doubt] that his testimony is true.

I am telling the truth in Christ, I am not lying, my conscience testifies with me [enlightened and prompted] by the Holy Spirit,