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
abudawud:4852 – Musaddad > ʿĪsá b. Yūnus > al-Aʿmash > Abū Ṣāliḥ > Ibn ʿUmar

Abu Salih said: I asked Ibn ʿUmar: If they are four? He replied: Then it does not harm you.  

أبو داود:٤٨٥٢ – حَدَّثَنَا مُسَدَّدٌ حَدَّثَنَا عِيسَى بْنُ يُونُسَ حَدَّثَنَا الأَعْمَشُ عَنْ أَبِي صَالِحٍ عَنِ ابْنِ عُمَرَ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ مِثْلَهُ قَالَ أَبُو صَالِحٍ فَقُلْتُ لاِبْنِ عُمَرَ فَأَرْبَعَةٌ قَالَ لاَ يَضُرُّكَ