'Ammar bin Yasir (May Allah be pleased with them) reported:
I heard Messenger of Allah (ﷺ) saying, "Prolonging Salat (prayer) and shortening the Khutbah (religious talk) indicate the religious knowledge of the person. Make your Salat long and your sermon short."[Muslim]. (ID)
App reference (ID): Book 2, Hadith 20 (ID)
Arabic/English book reference (ID): Book 2, Hadith 700 (ID)