Nahj al-Balāgha

Hadith 1291
zakat
ومن كتاب له (عليه السلام) إلى بعض عمّاله، وقد بعثه على الصدقة
Instruction given to one of his officers whom he sent for the collection of zakāt and charities
Source: al-Sharīf al-Raḍī