Hadith #2883 (Sunan Ibn Majah)
Book: Chapters on Sacrifices
Narrator(s): al-Rabi' bin Sbyh الربيع بن صبيح, Anas ibn Malik, Da'ud bin al-Mhbr داود بن المحبر

“When the ten days (of Dhul-Hijjah) begin, and one of you wants to offer a sacrifice, let him not remove anything from his hair or skin.”

Source: https://parallelquran.com/hadith/sunan-ibn-majah-2883/