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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
ahmad-zuhd:986 – ʿAbdullāh > Hudbah b. Khālid > Hammām > Qatādah > Anas > Abū Hurayrah

[Machine] Shall I guide you to a cool treasure? They said, "What is it, Abu Huraira?" He said, "Fasting in winter."  

الزهد لأحمد:٩٨٦ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنَا هُدْبَةُ بْنُ خَالِدٍ حَدَّثَنَا هَمَّامٌ حَدَّثَنَا قَتَادَةُ عَنْ أَنَسٍ عَنْ أَبِي هُرَيْرَةَ قَالَ

أَلَا أَدُلُّكُمْ عَلَى غَنِيمَةٍ بَارِدَةٍ؟ قَالُوا مَاذَا يَا أَبَا هُرَيْرَةَ؟ قَالَ الصَّوْمُ فِي الشِّتَاءِ