1. A number of our people have narrated from Sahl ibn Ziyad from Ahmad ibn Muhammad from ibn abu Nasr from Tha‘labah ibn Maymun from Muhammad ibn Qays who has narrated the following: “I once asked abu Ja‘far عليه السلام, about the testimony of a blind man. He (the Imam) said, ‘Yes, it is admissible if he has preserved it.’”