Al-Kāfi

Hadith 1418
khums
5ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ مُحَمَّدِ بْنِ عِيسَى عَنِ الْحَسَنِ بْنِ مَيَّاحٍ عَنْ أَبِيهِ قَالَ قَالَ لِي أَبُو عَبْدِ الله (عَلَيْهِ السَّلام) يَا مَيَّاحُ دِرْهَمٌ يُوصَلُ بِهِ الامَامُ أَعْظَمُ وَزْناً مِنْ أُحُدٍ.
5. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from al-Hassan ibn Mayyah from his father who has said the following “Once abu ‘Abdallah (a.s.) said to me, “O Mayyah, one Dirham paid to the Imam is greater in weight than the mountain of ’Uhud.”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī