Sahih Muslim
The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fadail Al-Sahabah)
Book Number: 031 / Hadith Number: 6106
Anas reported a hadith like this from Allah's Apostle (may peace be upon him) but he has made no mention in the hadith of the words of Sa'd.