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." (TR)
English reference (TR): Vol. 4, Book 26, Hadith 3149 (TR)
Arabic reference (TR): Book 26, Hadith 3269 (TR)