Sunnah.com reference : Book 2, Hadith 369English translation : Book 2, Hadith 0Arabic reference : Book 2, Hadith 451
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..."
وَفِي رِوَايَةٍ لَهُ كَانَتْ خُطْبَةُ اَلنَّبِيِّ ‏- صلى الله عليه وسلم ‏-يَوْمَ اَلْجُمُعَةِ: { يَحْمَدُ اَللَّهَ وَيُثْنِي عَلَيْهِ, ثُمَّ يَقُولُ عَلَى إِثْرِ ذَلِكَ, وَقَدْ عَلَا صَوْتُهُ }