Ibn Ishaq محمد بن إسحاق بن يسار‎ · Chapters on Sacrifices

“Whoever among you sees the new crescent of Dhul-Hijjah and wants to offer a sacrifice, let him not take anything from his hair or nails.”

“The Messenger of Allah (ﷺ) passed by one of the houses of the Ansar and noticed the smell of a cooking pot. He said: ‘Who is this who has slaughtered?’ A man from among us came out and said: ‘It is me, O Messenger of Allah, I slaughtered before the prayer so that I could feed my family and neighbors.’ He commanded him to repeat it. He said: ‘No, by the One besides Whom there is none worthy of worship,…