Ash-Shama'il Al-Muhammadiyah, Book 44, Hadith 320 (In-Book)

Qataadah Radiyallahu 'Anhu narrates that Allah gave to every Nabi that He had sent a beautiful feature and beautiful voice. Your Nabi Sallallahu 'Alayhi Wasallam also had a beautiful feature and a beautiful voice. Rasulullah Sallallhu 'Alayhi Wasallam did not recite in a melodious tone as singers do.

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ‏:‏ حَدَّثَنَا نُوحُ بْنُ قَيْسٍ الْحُدَّانِيُّ، عَنْ حُسَامِ بْنِ مِصَكٍّ، عَنْ قَتَادَةَ، قَالَ‏:‏ مَا بَعَثَ اللَّهُ نَبِيًّا إِلا حَسَنَ الْوَجْهِ، حَسَنَ الصَّوْتِ، وَكَانَ نَبِيُّكُمْ صلى الله عليه وسلم حَسَنَ الْوَجْهِ، حَسَنَ الصَّوْتِ، وَكَانَ لا يُرَجِّعُ‏.‏

also referenced under: Book 43, Hadith 303 (English)