‏الأضاحي : Hadeeth No:4870 Umm Salama reported Allaah's Prophet (sallAllaahu alayhi wa sallam) as saying: If anyone of you intends to offer sacrifice he should not get his hair cut or nails trimmed....

‏الإمارة : Hadeeth No:4585 The same tradition has been handed down through a different chain of transmitters....