Is there any mention in the Sunnah of consuming sheep fat to treat sciatica?

The Prophetic Sunnah mentions a cure for "sciatica," which is a pain that starts from the hip joint and extends down to the thigh, sometimes reaching the ankle. It is treated by taking the fat tail (aliya) of a medium-sized Bedouin sheep – or the fat tail of a ram – cutting it into small pieces, melting it, then dividing it into three parts. One part is to be drunk each day on an empty stomach. Ibn al-Qayyim stated that this treatment is beneficial for the people of Hijaz and those in their vicinity, because this disease often results from dryness or a thick, viscous substance. The fat tail possesses the properties of ripening and softening that are necessary for its cure. The specification of the Bedouin sheep is due to its low excess matter, the fineness of its essence, and the particularity of its pasture.