Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
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
suyuti:11257a –
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السيوطي:١١٢٥٧a –

"الصِّيَامُ جُنَّةٌ وَحِصْنٌ حَصِينٌ مِنَ النارِ ".  

[حم] أحمد [هب] البيهقى في شعب الإيمان عن أبي هريرة

See similar narrations below:

Collected by Aḥmad, Suyūṭī
ahmad:9225 – ʿAttāb > ʿAbdullāh > Ibn Lahīʿah > Abū Yūnus > Abū Hurayrah

[Machine] From the Prophet ﷺ who said: "Fasting is a shield and a fortress, protecting from the Hellfire."  

أحمد:٩٢٢٥ – حَدَّثَنَا عَتَّابٌ قَالَ حَدَّثَنَا عَبْدُ اللهِ قَالَ أَخْبَرَنَا ابْنُ لَهِيعَةَ قَالَ حَدَّثَنِي أَبُو يُونُسَ عَنْ أَبِي هُرَيْرَةَ

عَنِ النَّبِيِّ ﷺ قَالَ الصِّيَامُ جُنَّةٌ وَحِصْنٌ حَصِينٌ مِنَ النَّارِ