Tacit and Explicit Testimony as proof of abu Ja‘far al-Thani’s (the second) عليه السلام Divine Authority over the people after abu al-Hassan al-Rida عليه السلام

3. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from his father, Muhammad ibn ‘Isa who has said the following. “Once I went to see abu Ja‘far al-Thani’s عليه السلام. He debated me in several issues. He then said, “O abu Ali, there is no (reason for) doubt; I am the only son that my father had.”