The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 576 (#Ḥadīth #23)

23- حَدَّثَنا أَحمَد بن هارُون الفامي رَضِىَ اللهُ عَنْهُ قالَحَدَّثَنا مُحَمَّد بن جَعفَر بن بطة قالَ حَدَّثَنا مُحَمَّد بن عَلِيٍّ بن محبوب عَن إِبراهِيم بن هاشِمٍ عَن سُلَيمان بن حفص المروزي قالَ سَمِعتُ أبا الحَسَن مُوسَى بن جَعفَر a.sُ إن ابني عَلِيٍّ مقتول بالسم ظلما و مدفون إلى جنب هارون بطوس من زاره كمن زار رسول الله صَلَّى اللهُ عَلَيْهِ وَآلِهِ

66-23 Ahmad ibn Harun al-Fami - may God be pleased with him - narrated that Muhammad ibn Ja’far ibn Batta quoted on the authority of Muhammad ibn Ali ibn Mahboob, on the authority of Ibrahim ibn Hashem, on the authority of Soleiman ibn Hafs al-Marvazi that he had heard (Ar-Ridha’’s father) Abal Hassan Musa ibn Ja’far say, “My son Ali (Ar-Ridha’ ) will be oppressively poisoned and killed. He will be buried in Toos next to (Al-Ma’mun’s father) Harun. Whoever visits Ar-Ridha’ , it is as if he has visited God’s Prophet (S)."

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).