The Rare Ahadith
Al-Kāfi|Volume 4|Book 1|Chapter 43
5ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ عَلِيِّ بْنِ حَسَّانَ عَنْ مُوسَى بْنِ بَكْ��ٍ عَنْ أَبِي الْحَسَنِ مُوسَى (عَلَيْهِ السَّلاَم) قَالَ حَصِّنُوا أَمْوَالَكُمْ بِالزَّكَاةِ.
5. A number of our people have narrated from Sahl ibn Ziyad from Ali ibn Hassan from Musa ibn Bakr who has said the following: “Abu al-Hassan, Musa عليه السلام, has said, ‘Fortify your belongings by paying zakat.’”
- Ṣaḥīḥ al-Kāfī