'Testimony to Them' in the Bible

and He *said to him, “See that you say nothing to anyone; but go, show yourself to the priest and offer for your cleansing what Moses commanded, as a testimony to them.”

“But be on your guard; for they will deliver you to the courts, and you will be flogged in the synagogues, and you will stand before governors and kings for My sake, as a testimony to them.