´It was narrated from Ummm Salamah that the Prophet said:` "Whoever sees the new crescent of Dhul-Hijjah and wants to offer a sacrifice, let him not remove any of his hair or nails until he has offered the sacrifice."
Hadith ReferenceSunan an-Nasa'i / The Book of ad-Dahaya (Sacrifices) / Hadith: 4366
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم