Al-Kāfi - The Book of Haj

َّدٍ عَنْ رِزْقِ الله بْنِ أَبِي الْعَلاءِ عَنْ سُلَيْ٠َرَ السَّرَّاجِ عَنْ بَعْضِ أَصْحَابِنَا قَالَ يُؤْخَذُ طِينُ قَبْرِ الْحُسَيْنِ (عَلَيْهِ السَّلاَ٠ِنْ عِنْدِ الْقَبْرِ عَلَى سَبْعِينَ ذِرَاعاً. 5.

Ahmad ibn Muhammad has narrated from Rizq Allah ibn abu al-‘Ala’ from Sulayman ibn ‘Umar al-Sarraj from certain individuals of our people who has said the following: “Clay of the grave of al-Husayn (a.s.), can be taken from within a seventy square yard area.” رسل - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (8/317))