Narrated Umm Salamah: That the Prophet (ﷺ) said: "Whoever sees the crescent of Dhul-Hijjah, and wants to slaughter a sacrifice he should not take from his hair nor from his nails"
SahihSahihHasan SahihBook 19 · Hadith 36
جامع الترمذي
Narrated Umm Salamah: That the Prophet (ﷺ) said: "Whoever sees the crescent of Dhul-Hijjah, and wants to slaughter a sacrifice he should not take from his hair nor from his nails"