'Untainted' in the Bible

The Lord's words are absolutely reliable. They are as untainted as silver purified in a furnace on the ground, where it is thoroughly refined.

so that you may learn to recognize and treasure what is excellent [identifying the best, and distinguishing moral differences], and that you may be pure and blameless until the day of Christ [actually living lives that lead others away from sin];

Your lives should be untainted by love for money. Be content with what you have; for God Himself has said, "I will never, never let go your hand: I will never never forsake you."

No lie was found in their mouth, for they are blameless (spotless, untainted, beyond reproach).