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
muslim:1656f – [Chain 1] ʿAbdullāh b. ʿAbd al-Raḥman al-Dārimī > Ḥajjāj b. al-Minhāl > Ḥammād > Ayyūb [Chain 2] Yaḥyá b. Khalaf > ʿAbd al-Aʿlá > Muḥammad b. Isḥāq > Nāfiʿ

This hadith has been transmitted on the authority of Ibn Umar through another chain of transmitters but with a slight variation of words.  

مسلم:١٦٥٦f – وَحَدَّثَنِي عَبْدُ اللَّهِ بْنُ عَبْدِ الرَّحْمَنِ الدَّارِمِيُّ حَدَّثَنَا حَجَّاجُ بْنُ الْمِنْهَالِ حَدَّثَنَا حَمَّادٌ عَنْ أَيُّوبَ ح وَحَدَّثَنَا يَحْيَى بْنُ خَلَفٍ حَدَّثَنَا عَبْدُ الأَعْلَى عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ كِلاَهُمَا عَنْ نَافِعٍ

عَنِ ابْنِ عُمَرَ بِهَذَا الْحَدِيثِ فِي النَّذْرِ وَفِي حَدِيثِهِمَا جَمِيعًا اعْتِكَافُ يَوْمٍ