Hadith on Sermons: Prolong the prayer, make sermon concise

‘Ammar reported: The Messenger of Allah, peace and blessings be upon him, said, “Verily, the length of a man’s prayer and the brevity of his sermon is a sign of his understanding. Lengthen the prayer and shorten the sermon. Verily, some eloquence is charming.”

Source: Ṣaḥīḥ Muslim 869

Grade: Sahih (authentic) according to Muslim

عَنْ عَمَّار قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّ طُولَ صَلَاةِ الرَّجُلِ وَقِصَرَ خُطْبَتِهِ مَئِنَّةٌ مِنْ فِقْهِهِ فَأَطِيلُوا الصَّلَاةَ وَاقْصُرُوا الْخُطْبَةَ وَإِنَّ مِنْ الْبَيَانِ سِحْرًا

869 صحيح مسلم كتاب الجمعة باب تخفيف الصلاة والخطبة