'Testify' in the Bible

beginning with the baptism by John [at the outset of Jesus’ ministry] until the day when He was taken up from us—one of these men must become a witness with us [to testify] of His resurrection.”

All the prophets testify about Him, that through His name everyone who believes in Him [whoever trusts in and relies on Him, accepting Him as Savior and Messiah] receives forgiveness of sins.”

For that reason I testify to you on this [our parting] day that I am innocent of the blood of all people.

as the high priest and all the Council of the elders (Sanhedrin, Jewish High Court) can testify; because from them I received letters to the brothers, and I was on my way to Damascus in order to bring those [believers] who were there to Jerusalem in chains to be punished.

They have known me for a long time, if they are willing to testify to it, that according to the strictest sect of our religion, I have lived as a Pharisee.