Whoever blasphemes against the Father will be forgiven, and whoever blasphemes against the Son will be forgiven, but whoever blasphemes against the Holy Spirit will not be forgiven either on earth or in heaven. (Gospel of Thomas Saying 44)

(Some manuscripts read: 'If your brother sins, go and show him his fault...')

Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men. …

If your brother sins against you, go and show him his fault, just between the two of you. If he listens to you, you have won your brother over. (Matthew 18:15)…