It wasnarrated from Umm Salamah that the Prophet (ﷺ) said:
"Whentheten days (of Dhul-Hijjah) begin, and one of you wants to offer asacrifice, let him not remove anything from his hair or skin." (ES)
English reference (ES): Vol. 4, Book 26, Hadith 3149 (ES)
Arabic reference (ES): Book 26, Hadith 3269 (ES)