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
hakim:2601 – my father

[Machine] The Arabs used to say, "Whoever eats bread with ‘samn’ (a type of clarified butter), when Khaibar is conquered, we will be ‘jihidna’ (withheld) regarding his portion of bread." So, when we conquered Khaibar, I sat on some (bread) and ate from it until I was full. Then, I looked at my abdomen and wondered, "Did I gain weight?"  

الحاكم:٢٦٠١ – أَخْبَرَنَا أَبُو سَعِيدٍ أَحْمَدُ بْنُ يَعْقُوبَ الثَّقَفِيُّ ثنا مُوسَى بْنُ هَارُونَ ثنا أَحْمَدُ بْنُ حَنْبَلٍ وَمُؤَمَّلُ بْنُ هِشَامٍ قَالَا ثنا إِسْمَاعِيلُ عَنْ يُونُسَ عَنِ الْحَسَنِ عَنْ أَبِي بَرْزَةَ الْأَسْلَمِيِّ قَالَ

كَانَتِ الْعَرَبُ تَقُولُ مَنْ أَكَلَ الْخُبْزَ سَمِنَ فَلَمَّا فَتَحْنَا خَيْبَرَ «جَهِضْنَاهُمْ عَنْ خُبْزَةٍ لَهُمْ فَقَعَدْتُ عَلَيْهَا فَأَكَلْتُ مِنْهَا حَتَّى شَبِعْتُ فَجَعَلْتُ أَنْظُرُ فِي عِطْفَيَّ هَلْ سَمِنْتُ؟»  

هَذَا حَدِيثٌ صَحِيحُ الْإِسْنَادِ وَلَمْ يُخَرِّجَاهُ صحيح

See similar narrations below:

Collected by Bayhaqī
bayhaqi:17998 – Abū ʿAbdullāh al-Ḥāfiẓ from my father

[Machine] The Arabs used to say, "Whoever eats bread made with fat, when we conquer Khaybar, we will keep them away from their share of bread." So, I sat on top of it and ate from it until I was full. Then, I started to think about my belly and wondered if it became bigger. Yunus said this and others said it was Ayub.  

البيهقي:١٧٩٩٨ – وَأَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أنبأ أَبُو سَعِيدٍ أَحْمَدُ بْنُ يَعْقُوبَ الثَّقَفِيُّ ثنا مُوسَى بْنُ هَارُونَ ثنا أَحْمَدُ بْنُ حَنْبَلٍ وَمُؤَمَّلُ بْنُ هِشَامٍ قَالَا ثنا إِسْمَاعِيلُ عَنْ يُونُسَ عَنِ الْحَسَنِ عَنْ أَبِي بَرْزَةَ الْأَسْلَمِيِّ ؓ قَالَ

كَانَتِ الْعَرَبُ تَقُولُ مَنْ أَكَلَ الْخُبْزَ سَمِنَ فَلَمَّا فَتَحْنَا خَيْبَرَ جَهَضْنَاهُمْ عَنْ خُبْزَةٍ لَهُمْ فَقَعَدْتُ عَلَيْهَا فَأَكَلْتُ مِنْهَا حَتَّى شَبِعْتُ فَجَعَلْتُ أَنْظُرُ فِي عِطْفِيَّ هَلْ سَمِنْتُ كَذَا قَالَ عَنْ يُونُسَ وَقَالَ غَيْرُهُ عَنْ أَيُّوبَ