رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1218
The Book of Virtues
The Excellence of Observing Saum (Fasts) during Ramadan
وَعَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَا مِنْ عَبْدٍ يَصُومُ يَوْمًا فِي سَبِيلِ اللَّهِ إِلاَّ بَاعَدَ اللَّهُ بِذَلِكَ الْيَوْمِ وَجْهَهُ عَنِ النَّارِ سَبْعِينَ خَرِيفًا ((مُتَّفَقٌ عَلَيْهِ))
Abu Sa'id Al-Khudri (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said, "Every slave of Allah who observes Saum (fasting) for one day for the sake of Allah, Allah will draw his face farther from Hell-fire to the extent of a distance to be covered in seventy years." [Al-Bukhari and Muslim].
Riyad as-Salihin, 1218