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.
bayhaqi:699Abū ʿAbdullāh al-Ḥāfiẓ > Aḥmad b. Kāmil b. Khalaf al-Qāḍī > Muḥammad b. Ismāʿīl al-Sulamī > ʿAbd al-ʿAzīz b. ʿAbdullāh al-Ūwaysī

[Machine] Malik ibn Anas mentioned that some people pluck their mustaches, so he said that those who do so should be reprimanded, as there is no tradition of the Prophet ﷺ regarding plucking the mustache. Rather, it displays the shape of the lips and mouth. Malik ibn Anas said that shaving the mustache is an innovation that has appeared among the people.  

البيهقي:٦٩٩أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ ثنا أَحْمَدُ بْنُ كَامِلِ بْنِ خَلَفٍ الْقَاضِي ثنا مُحَمَّدُ بْنُ إِسْمَاعِيلَ السُّلَمِيُّ ثنا عَبْدُ الْعَزِيزِ بْنِ عَبْدِ اللهِ الْأُوَيْسِيُّ قَالَ

ذَكَرَ مَالِكُ بْنُ أَنَسَ إِحْفَاءَ بَعْضِ النَّاسِ شَوَارِبَهُمْ فَقَالَ مَالِكٌ يَنْبَغِي أَنْ يُضْرَبَ مَنْ صَنَعَ ذَلِكَ فَلَيْسَ حَدِيثُ النَّبِيِّ ﷺ فِي الْإِحْفَاءِ وَلَكِنْ يُبْدِي حَرْفَ الشَّفَتَيْنِ وَالْفَمَ قَالَ مَالِكُ بْنُ أَنَسٍ حَلْقُ الشَّارِبِ بِدْعَةٌ ظَهَرَتْ فِي النَّاسِ