صحیح ابن حبان
Ibn Hibban
كتاب الأضحية
Book of Sacrifice
ذكر البيان بأن هذا الفعل إنما زجر عنه لمن عنده أضحية يريد ذبحها وأهل عليه هلال ذي الحجة وهي عنده دون من اشتراها بعد هلاله عليه-
Clarifying that the prohibition is for those who already have a sacrificial animal at the start of Dhul-Hijjah, not those who buy it later
1 hadith
Hadith 5917
Sayyida Umm Salamah (may Allah be pleased with her) narrates: The Prophet Muhammad (peace be upon him) said: "Whoever intends to offer a sacrifice, when the new moon of Dhul-Hijjah is sighted, he should not cut his hair nor trim his nails until he has offered the sacrifice."