Ya'laa bin Mamlak Radiyallahu 'Anhu says:
"He asked Ummul Mu'mineen Sayyiditina Ummi Salamah Radiyallahu 'Anha about the recital of Rasulullah Sallallahu 'Alayhi Wasallam". She replied: "He recited every word separately and clearly". (ID)
English reference (ID): Book 43, Hadith 297 (ID)
Arabic reference (ID): Book 44, Hadith 314 (ID)