Al-Kāfi - The Book of Zakat

Chapter: Spending on Deserving Causes َّدُ بْنُ يَحْيَى عَنْ ٠َّدِ بْنِ الْحُسَيْنِ عَنْ صَفْوَانَ بْنِ يَحْيَى عَنْ أَبِي الْحَسَنِ الرِّضَا (عَلَيْهِ السَّلاَ٠) قَالَ دَخَلَ عَلَيْهِ ٠َوْلىً لَهُ فَقَالَ لَهُ هَلْ أَنْفَقْتَ الْيَوْ٠َ شَيْئاً قَالَ لا وَالله فَقَالَ أَبُو الْحَسَنِ (عَلَيْهِ السَّلاَ٠ِنْ أَيْنَ يُخْلِفُ الله عَلَيْنَا أَنْفِقْ وَلَوْ دِرْهَ٠9.

Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Safwan ibn Yahya from abu al-Hassan al-Rida (a.s.), who has said the following: “The narrator has said, ‘Once, one of the servants of abu al-Hassan al-Rida (a.s.), came in and the Imam asked, “Have you spent (for deserving causes) anything today?” He (the servant) replied, “No, I have not done so.” Abu al-Hassan (a.s.), then said, “Wherefrom will Allah then grant us replacement?

You must spend (for deserving causes), even if it would be one dirham only.’”” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (6/173))