وَفِي رِوَايَةٍ لَهُ كَانَتْ خُطْبَةُ اَلنَّبِيِّ ‏- صلى الله عليه وسلم ‏-يَوْمَ اَلْجُمُعَةِ: { يَحْمَدُ اَللَّهَ وَيُثْنِي عَلَيْهِ, ثُمَّ يَقُولُ عَلَى إِثْرِ ذَلِكَ, وَقَدْ عَلَا صَوْتُهُ }

And in a narration of Muslim

"In the Prophet's Khutbah on Friday: He would praise Allah and extol Him. Then, following that, he would say - and he had raised his voice..."