Hadithcore
Musnad Ahmad 1909
sahih· Darussalam

"Abdul-"Azeez bin Rufai" told us: Shaddad bin Ma"qil and I entered upon Ibn "Abbas, and Ibn ‘Abbas said:

The Messenger of Allah (ﷺ) did not leave anything except what is between these two covers. We entered upon Muhammad bin "Ali and he said something similar. And al-Mukhtar used to say: the Revelation.

References1 variant
Arabic/English book
Book 25, Hadith 1909