10. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn Mahbub from ‘Abdallah ibn Sinan who said: “I mentioned to Abu ‘Abdillah (al-Sadiq) عليه السلام a man who was afflicted with doubts in his ablution and prayer (constantly repeating them) and added that he is an intelligent man.” Abu 'Abdillah then said, ‘What kind of intelligence does he have, when he obeys Satan?’. I asked him, 'How is he obeying Satan?'. He replied, 'Ask him about this which he is doing, from which thing is it. He will certainly say to you, “It comes from the work of Satan.”