The Complete Pilgrimage Guide · Hadith 651 (#Ḥadīth #5)
Chapter 95 | Eating from any Clay is Unlawful Except the Clay of the Grave of Ĥusain , For Verily It Is the Cure
5 وَ وَجَدْتُ فِي حَدِيثِ الْحُسَيْنِ بْنِ مِهْرَانَ الْفَارِسِيِّ عَنْ مُحَمَّدِ بْنِ سَيَّارٍ عَنْ يَعْقُوبَ بْنِ يَزِيدَ يَرْفَعُ الْحَدِيثَ إِلَى الصَّادِقِ (ع) قَالَ مَنْ بَاعَ طِينَ قَبْرِ الْحُسَيْنِ (ع) فَإِنَّهُ يَبِيعُ لَحْمَ الْحُسَيْنِ (ع) وَ يَشْتَرِيهِ
5. I found the following in the Ḥadīth of Ḥusain ibn Mihrān Al-Fārisi who narrated from Muḥammad ibn Sayyār, from Ya’qūb ibn Yazīd, who narrated that: Imam Sādiq said: Anyone who sells the clay of the grave of Ḥusain has sold and bought the flesh of Ḥusain .
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).