'Blemish' in the Bible

how much more will the blood of the Messiah, who through the eternal Spirit offered Himself without blemish to God, cleanse our consciences from dead works to serve the living God?

but with the precious blood of Christ, like that of a lamb without defect or blemish.

Therefore, dear friends, while you wait for these things, make every effort to be found at peace with Him without spot or blemish.