Prayer (Kitab Al-Salat): Details of Commencing Prayer
Dawud :: Book 3 : Hadith 1151
Narrated Abdullah ibn as-Sa'ib:
I attended the 'Id prayer along with the Apostle of Allah (peace_be_upon_him). When he finished the prayer, he said: We shall deliver the sermon; he who likes to sit for listening to it may sit and he who likes to go away may go away.