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
darimi:527 – Sulaymān b. al-Mughīrah

[Machine] Awun ibn Abdullah told me about it, and I found it fascinating, so I wrote it down. And here is the narration.  

الدارمي:٥٢٧ – أخْبرنا الْحُسَيْنُ بْنُ مَنْصُورٍ حَدَّثنا أَبُو أُسَامَةَ حَدَّثَنِي سُلَيْمَانُ بْنُ الْمُغِيرَةِ قَالَ قَالَ أُبُو قِلَابَةَ خَرَجَ عَلَيْنَا عُمَرُ بْنُ عَبْدِ الْعَزِيزِ لِصَلَاةِ الظُّهْرِ وَمَعَهُ قِرْطَاسٌ ثُمَّ خَرَجَ عَلَيْنَا لِصَلَاةِ الْعَصْرِ وَهُوَ مَعَهُ فَقُلْتُ لَهُ يَا أَمِيرَ الْمُؤْمِنِينَ مَا هَذَا الْكِتَابُ؟ قَالَ هَذَا حَدِيثٌ

حَدَّثَنِي بِهِ عَوْنُ بْنُ عبْدِ اللَّهِ فَأَعْجَبَنِي فَكَتَبْتُهُ فَإِذَا فِيهِ هَذَا الْحَدِيثُ