In your kindness blot out our sins

"Then Jesus straightened up and said to her, “Woman, where are they? Has no one condemned you?”
She replied, “No one, sir.” Then Jesus said, “Neither do I condemn you. Go, [and] from now on do not sin any more."  (John 8: 10 - 11)

Let the person without sin be the first to throw a stone.

"Forgiveness is the remission of sins.  For it is by this that what has been lost, and was found, is saved from being lost again."  (St. Augustine)