Exodus 12:9
12:9 Do not eat it raw 1 or boiled in water, but roast it over the fire with its head, its legs, and its entrails.
Exodus 29:17
29:17 Then you are to cut the ram into pieces and wash the entrails and its legs and put them on its pieces and on its head
1 sn This ruling was to prevent their eating it just softened by the fire or partially roasted as differing customs might prescribe or allow.