'Testimony' in the Bible

He commanded him to tell no one, "But go your way, and show yourself to the priest, and offer for your cleansing according to what Moses commanded, for a testimony to them."

As many as don't receive you, when you depart from that city, shake off even the dust from your feet for a testimony against them."

You know the commandments: 'Don't commit adultery,' 'Don't murder,' 'Don't steal,' 'Don't give false testimony,' 'Honor your father and your mother.'"

It will turn out as a testimony for you.