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
nasai:5057 – Qutaybah > Bishr > Yūnus > al-Ḥasan And Muḥammad

"Combing one's hair (should be done) every other day."  

النسائي:٥٠٥٧ – أَخْبَرَنَا قُتَيْبَةُ قَالَ حَدَّثَنَا بِشْرٌ عَنْ يُونُسَ

عَنِ الْحَسَنِ وَمُحَمَّدٍ قَالاَ التَّرَجُّلُ غِبٌّ  

See similar narrations below:

Collected by Nasāʾī's Kubrá
nasai-kubra:9266 – Qutaybah > Bishr b. al-Mufaḍḍal > Yūnus b. ʿUbayd > al-Ḥasan And Muḥammad

"Combing one's hair (should be done) every other day." (Using translation from Nasāʾī 5057)  

الكبرى للنسائي:٩٢٦٦ – أَخْبَرَنَا قُتَيْبَةُ قَالَ حَدَّثَنَا بِشْرُ بْنُ الْمُفَضَّلِ عَنْ يُونُسَ بْنُ عُبَيْدٍ

عَنِ الْحَسَنِ وَمُحَمَّدٍ قَالَا «التَّرَجُّلُ غِبٌّ»