On [Eating] Flesh
Muhammad b. al-Mundhir narrated from ‘Ali, the brother of Ya’qub from Dawud from Harun from Ibn al-Jahm from Isma’il b. Abu Muslim al-Sakufi from Abu ‘Abd Allah al-Sadiq, peace be upon him, that a man said to him: “O son of the Messenger of Allah, some Sunni scholars believe the Prophet, blessings of Allah on him and his family, said that Allah hates the butchers (al-lahhamun) and those who eat flesh (al-lahm) every day.” He [al-Sadiq] said: “They have made a clear error. The Messenger of Allah only said that Allah hates those who eat the flesh of people in their houses, that is, who slander people. What is the matter with them? May Allah not have mercy on them. They go to what is lawful and make it unlawful by their numerous reports.”
From Abu ‘Abd Allah Ja’far b. Muhammad al-Sadiq, peace be upon him, who said: “Flesh produces flesh and increases the intellect. Whoever gives up eating it for some days, his intellect will be impaired.”
And in another report, from him: “Whoever gives up eating flesh for forty days will become ill-natured and his intellect will be impaired. Whoever becomes ill-natured, call to him in his ear with the iqama.