مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 2072
Fasting
Voluntary Fasting - Section 3
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لِكُلِّ شَيْءٍ زَكَاةٌ وَزَكَاةُ الْجَسَدِ الصَّوْمُ» . رَوَاهُ ابْن مَاجَه
Abu Huraira reported God’s messenger as saying, “There is zakat applicable to everything, and the zakat of the body is fasting.” Ibn Majah transmitted it.
Mishkat al-Masabih, 2072ضَعِيفٌ (الألباني)