Al-Kāfi

4. Through the same chain of narrator it is narrated from Muhammad ibn ‘Abd al-Hamid from al-‘Ala’ ibn Razin from abu ‘Ubayda al-Hadhdha’ from abu Ja’far عليه السلام who has said the following. “Whoever teaches a subject of guidance he will receive a reward equal to the rewards of those who would practice such guidance without any reduction in the rewards of the later ones. Whoever would introduce a subject of misguidance he will suffer equal to the suffering due for each time it is practiced without any reduction in the suffering of whoever would practice such misguidance.”