'Testify' in the Bible

and the king sendeth and calleth for Shimei, and saith unto him, 'Have I not caused thee to swear by Jehovah -- and I testify against thee, saying, In the day of thy going out, and thou hast gone anywhere, thou dost certainly know that thou dost surely die; and thou sayest unto me, The word I have heard is good?

Then seat two wicked men opposite him and have them testify against him, saying, “You have cursed God and the king!” Then take him out and stone him to death.

and two men -- sons of worthlessness -- come in, and sit over-against him, and the men of worthlessness testify of him, even Naboth, before the people, saying, 'Naboth blessed God and Melech;' and they take him out to the outside of the city, and stone him with stones, and he dieth;