Matthew 6:1, 6, 14

Take heed that ye do not your righteousness before men, to be seen of them: else ye have no reward with your Father who is in heaven.

But thou, when thou prayest, enter into thine inner chamber, and having shut thy door, pray to thy Father who is in secret, and thy Father who seeth in secret shall recompense thee.

For if ye forgive men their trespasses, your heavenly Father will also forgive you.