It's often just a slip of the lip and not a deliberate act of malice. Do not condemn, and you will not be condemned. Forgive and you will be forgiven. Its so easy to justify our own actions while condemning someone else's. Scripture tells us that love fulfills the law.
Love is patient, love is kind.
It does not envy, it does not boast, it is not proud. It is not rude, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres. I was rude and she kept a record of my wrong.