Musnad Abu Ya'la al-Mawsili 152:228

Abu Khaythama narrated to us, Yazid bin Harun narrated to us, Shu'bah informed us, from Simak, from 'Abd al-Rahman bin 'Abd Allah, from his father, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "May Allah make radiant a man who heard a hadith from us, then conveyed it just as he heard it, for perhaps the one to whom it is conveyed understands it better than the one who heard it."