الكافي 1/4/124/21

21. Ishaq has narrated from abu Hashim al-Ja‘fari who has said the following. “One day I went to see abu Muhammad عليه السلام and I wanted him to give me a certain amount of silver so I can make a ring out of it and keep for blessing. I sat down but forgot to ask what I had come for. When was leaving and said farewell to him he threw a ring to me and said, “You wanted silver and we gave you and profited the gems and the cost of the goldsmith works. May Allah grant you blessings O abu Hashim.” I then said, “I testify that you are the Wali of Allah, (one who possesses Divine Authority) and my Imam through my obedience whom I follow the religion of Allah.” He then said, “May Allah grant you forgiveness, O abu Hashim.”