Ahmad ibn Hilal has said, "I had heard this hadith fifty six years ago." H 917, Ch. 80, h 30 Abu Ali al-Ash'ari has narrated from Muhammad ibn Hassa'n from Muhammad ibn Ali from 'Abdallah ibn al-Qasim from al-Mufaddal ibn 'Umar from abu 'Abdallah (a.s.) who has said the following about the words of Allah. "When the trumpet is sounded," (74:8) From us there will be a triumphant Imam. behind the cover.
Bukhari amenakili ndani ya sahih yake, Kitabul-ilmi, babu kaifa yuqbahd-ilm, amesema, "Umar ibn Abdul-aziz alimwandikia Abubakar ibn Hazmi akamwambia, Ziangalie hadithi za Mtume wa Mwenyezi Mungu (s.a.w.w.) uziandike, hakika mimi nachelea kuhusu elimu na kutoweka kwa wanachuoni, na isikubaliwe isipokuwa iwe ni hadithi ya Mtume (s.a.w.) na elimu ienezwe na watu wakae ili kila asiyejua afundishwe, kwani elimu haipotei mpaka pale inapofichwa.