Sayyiduna Jabir bin Samurah (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) used to deliver the sermon while standing, then he would sit down, then stand up and recite verses and remember Allah. His sermon and prayer used to be moderate in length.
Hadith Referenceالمنتقى ابن الجارود / كتاب الصلاة / 296
Hadith Gradingغلام مصطفےٰ ظهير امن پوري:صحيح
Hadith Takhrijاز غلام مصطفےٰ ظهير امن پوري:«صحيح مسلم : 866»