وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، أَنَّ أَبَاهُ، كَانَ يَنْحَرُ بُدْنَهُ قِيَامًا . قَالَ مَالِكٌ لاَ يَجُوزُ لأَحَدٍ أَنْ يَحْلِقَ رَأْسَهُ حَتَّى يَنْحَرَ هَدْيَهُ وَلاَ يَنْبَغِي لأَحَدٍ أَنْ يَنْحَرَ قَبْلَ الْفَجْرِ يَوْمَ النَّحْرِ وَإِنَّمَا الْعَمَلُ كُلُّهُ يَوْمَ النَّحْرِ الذَّبْحُ وَلُبْسُ الثِّيَابِ وَإِلْقَاءُ التَّفَثِ وَالْحِلاَقُ لاَ يَكُونُ شَىْءٌ مِنْ ذَلِكَ يُفْعَلُ قَبْلَ يَوْمِ النَّحْرِ .
Yahya related to me from Malik from Hisham ibn Urwa that hisfather used to kill his sacrificial animals while they were standing. Malik said, "No-one is permitted to shave his head until hehas killed his sacrificial animal, and no-one must sacrifice beforedawn on the day of sacrifice. The things that should be done on theday of sacrifice are slaughtering, donning clothes, grooming the bodygenerally (at-tafath) and shaving the head, and none of this may bedone before the day of sacrifice." Translation Not Available
Book Ref: Muwatta Imam Malik Book 20 Hadith 891
Web Ref: Muwatta Imam Malik Book 20 Hadith 192