It wasnarrated from Umm Salamah that the Messenger of Allah (ﷺ)said:
"Whoever among you sees the new crescent of Dhul-Hijjah andwantsto offer a sacrifice, let him not take anything from his hair ornails." (ES)
English reference (ES): Vol. 4, Book 26, Hadith 3150 (ES)
Arabic reference (ES): Book 26, Hadith 3270 (ES)