(1) باب
Narrated AbuSa'id al-Khudri:
The Messenger of Allah (ﷺ) related a tradition in which he mentioned the words "Jibril and Mikal" and he pronounced them "Jibra'ila wa Mika'ila."Abu Dawud said: Khalaf said: I did not put the pen aside from writing letters (huruf) for forty years: nothing tired me (or made me incapable of writing), even Jibril and Mika'il did not tire me. (DE)
Reference (DE): Sunan Abi Dawud 3998 (DE)
In-book reference (DE): Book 32, Hadith 30 (DE)
English translation (DE): Book 31, Hadith 3987 (DE)