from his father, form his grandfather - the on the Day of Kahaibar, the Messenger of Allah forbade the flesh of domesticated donkeys and of al-Jallalah (animals that eat dung), and (he forbade) riding them and eating their mat."
The Book of ad-Dahaya (Sacrifices)
Sunan an-Nasa'i 4447 - Commentary by Imam an-Nasa'i
Prohibition Analysis
The prohibition of domesticated donkey meat stems from their classification as beasts of burden, not intended for consumption. Their flesh is considered impure (najis) and harmful to human constitution.
Al-Jallalah refers to animals that predominantly consume filth and excrement, making their flesh contaminated and unfit for consumption due to the transfer of impurities.
Legal Rulings
Riding domesticated donkeys remains permissible for necessary transportation, as evidenced by other authentic narrations where the Prophet (ﷺ) himself rode donkeys.
The prohibition of "eating their mat" refers to using their skins or sitting on them before proper tanning, as untanned hides of forbidden animals retain impurity.
Purification Method
If a Jallalah animal is isolated and fed clean food for a sufficient period (scholars differ between 3-40 days), its meat becomes permissible once the effects of impure consumption dissipate.
Wild donkeys (onagers) are exempt from this prohibition, as established in other authentic narrations permitting their consumption.