‏الصلاة : Hadeeth No:1545 Ka'b b. Malik reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) did not come back from the journey but by day in the forenoon, and when he arrived, he went first to the mosque, and having prayed two rak'ahs in it he sat down in it....

‏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...