Hadithcore
Mishkat al-Masabih, 4437

Ibn ‘Abbas said the Prophet (ﷺ) used to clip or take something off his moustache, and Abraham the friend of the Compassionate One used to do it. Tirmidhi transmitted it.

عَنِ ابْنِ عَبَّاسٍ قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُصُّ أَوْ يَأْخُذُ مِنْ شَارِبِهِ وَكَانَ إِبْرَاهِيمُ خَلِيلُ الرَّحْمَنِ صَلَوَاتُ الرَّحْمَنِ عَلَيْهِ يَفْعَله. رَوَاهُ التِّرْمِذِيّ

References1 variant
In-Book Reference
Book 22, Hadith 126