{And to those who are Jews, We prohibited every animal with undivided hoof.} Qatadah said: Meaning the camel and the ostrich. {And of the bovine and the sheep, We prohibited to them their fat, except what their backs carry or the entrails.} And it is the place of dung.

Muhammad said: The "hawaya" (entrails) are the places of dung, the singular of which is "hawiya" or "hawiyyah."

Surat al-An'am from verse (147) to verse (150).