‏الأضاحي : Hadeeth No:4871 Umm Salama reported (these words) directly from Allaah's Messenger (sallAllaahu alayhi wa sallam): If anyone has in his possession a sacrificial animal to offer as a sacrifice (on 'Id al-Adha), he should not get his hair cut and nails trimmed after he has entered the first days of Dhu'l Hijja...

‏الإيمان : Hadeeth No:358 Abu Nadra narrated it from Abu Sa'id al-Khudri who reported it from the Prophet (sallAllaahu alayhi wa sallam) a similar (hadith) up to the words:" in the mud of the flood," and he did not mention (the words narrated) after it....