مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1535
Musnad Abu Ishaq Sa'd bin Abi Waqqas
It was narrated from Muhammad bin Sa"d bin Abi Waqqas, from his father, that the Messenger of Allah (ﷺ) said: “For the belly of one of you to be filled with pus and blood is better for him than filling [his mind] with poetry.”
Musnad Ahmad 1535Sahih (Darussalam) [Muslim (2258)]