The Rare Ahadith
Al-Kāfi|Volume 7|Book 1|Chapter 37
4- مُحَمَّدُ بْنُ يَحْيَى رَفَعَهُ عَنْهُمْ (عَلَيْهِم السَّلام) قَالَ قَالَ مَنْ أَوْصَى بِالثُّلُثِ احْتُسِبَ لَهُ مِنْ زَكَاتِهِ.
4. Muhammad ibn Yahya has narrated in a marfu‘ the following: “‘A’immah, ‘Alayhim al-Salam, have said, ‘If one makes a will about one-third of his legacy it is counted as his Zakat.’”
- Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (23/95)
- Ṣaḥīḥ al-Kāfī