The Book of ad-Dahaya (Sacrifices)
43/1. Chapter:
The One Who Wishes To Offer A Sacrifice Should Not Remove Any Of His Hair
Sunan an-Nasai
أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ أَنْبَأَنَا شَرِيكٌ، عَنْ عُثْمَانَ الأَحْلاَفِيِّ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، قَالَ مَنْ أَرَادَ أَنْ يُضَحِّيَ، فَدَخَلَتْ أَيَّامُ الْعَشْرِ فَلاَ يَأْخُذْ مِنْ شَعْرِهِ وَلاَ أَظْفَارِهِ . فَذَكَرْتُهُ لِعِكْرِمَةَ فَقَالَ أَلاَ يَعْتَزِلُ النِّسَاءَ وَالطِّيبَ .
It was narrated that Sa'eed bin Al-Musayyab said: "Whoever wants to offer a sacrifice when dhul-Hijjah begins, let him not remove anything from his hair or nails." I (the narrator) mentioned that to 'Ikrimah, and he said: "Should he not also keep away from women and perfume?"
Reference : Sunan an-Nasa'i 4363In-book reference : Book 43, Hadith 3English translation : Vol. 5, Book 43, Hadith 4368