Mohammad Tayar says:
One day I went to the house of Imam Baqir (peace be upon him) and asked permission to enter.
Imam did not allow but allowed another person to enter.
I returned home and threw myself on my bed in a sad state, I lost my faith in Imam and thought about which sect is right: Murjee, Qadiriyyah, Haruriyyah, or Zaydiyyah. I was wondering which sect to believe in.
Just as I was thinking, they knocked on the door.
He was the messenger of Imam Baqir (peace be upon him).
He said: “Imam has asked for you.”
I went with him to Imam’s house. Seeing me, Imam said: “Muhammad! Do not go to Marjee, not Qadiriyyah, not Haruriyyah, not Zaidiyyah.
Come to us! There was a reason why I didn’t let you come home.” Then he gave reasons that convinced me.
I also accepted him words and my belief in his Imamate was established.
Sources:
Bihar al-Anwar, volume 46, page 271, hadith 74.