مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1991
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn "Abbas - Sufyan said: I think it must be from the Prophet (ﷺ) -: "Bring me a Book (revealed before this), or some trace of knowledge" [al-Ahqaf 46:4]. He said: “The calligraphy."
Musnad Ahmad 1992Sahih (Darussalam) []