Abu Dawud
Knowledge
Book Number: 019 / Hadith Number: 3652
Narated By Zayd ibn Thabit : I heard the Apostle of Allah (pbuh) say: May Allah brighten a man who hears a tradition from us, gets it by heart and passes it on to others. Many a bearer of knowledge conveys it to one who is more versed than he is; and many a bearer of knowledge is not versed in it.