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
ahmad:8672 – Yaḥyá b. Isḥāq > Abū ʿAwānah > ʿUmar b. Abū Salamah from his father > Abū Hurayrah

[Machine] The Messenger of Allah ﷺ said, "Trim the mustaches and let the beards grow. Change the color of your grey hair and do not imitate the Jews and Christians."  

أحمد:٨٦٧٢ – حَدَّثَنَا يَحْيَى بْنُ إِسْحَاقَ حَدَّثَنَا أَبُو عَوَانَةَ عَنْ عُمَرَ بْنِ أَبِي سَلَمَةَ عَنْ أَبِيهِ عَنْ أَبِي هُرَيْرَةَ

أَنَّ رَسُولَ اللهِ ﷺ قَالَ أَعْفُوا اللِّحَى وَخُذُواالشَّوَارِبَ وَغَيِّرُوا شَيْبَكُمْ وَلَا تَشَبَّهُوا بِالْيَهُودِ وَالنَّصَارَى  

See similar narrations below:

Collected by Ibn Ḥibbān, Suyūṭī

ذِكْرُ الْأَمْرِ بِتَغْيِيرِ الشَّيْبِ إِذَا كَانَ أَهْلُ الْكِتَابِ لَا يُغَيِّرُونَهُ

ibnhibban:5473 – Abū Yaʿlá > Muḥammad b. ʿAbdullāh b. Numayr > Ibn Idrīs > Muḥammad b. ʿAmr > Abū Salamah > Abū Hurayrah

The Messenger of Allah ﷺ said: “Change grey hair, and do not resemble the Jews.ʿ (Using translation from Aḥmad 1415)  

ابن حبّان:٥٤٧٣ – أَخْبَرَنَا أَبُو يَعْلَى قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ قَالَ حَدَّثَنَا ابْنُ إِدْرِيسَ عَنْ مُحَمَّدِ بْنِ عَمْرٍو عَنْ أَبِي سَلَمَةَ عَنْ أَبِي هُرَيْرَةَ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ «غَيِّرُوا الشَّيْبَ وَلَا تَشَبَّهُوا بِالْيَهُودِ وَالنَّصَارَى»