Testimony of a Blind and Speechless

2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from al-Hajjal 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 if it is admissible. He (the Imam) said, ‘Yes, it is admissible if he has preserved it.’”