Treasury of Scripture Knowledge
And all the fat of the sin-bearing bullock, shall he heave up therefrom, - the fat that covereth over the inwards, and all the fat that is upon the inwards;
and, as for all the fat thereof, one shall bring near therefrom, - the fat-tail, and the fat that covereth the inwards;
And he took all the fat that was on the inwards, and the caul of the liver, and the two kidneys and their fat, - and Moses made a perfume at the altar.
1 Samuel 2:15
Also, before any could make perfume with the fat, the priests young man would come in and say to the person who was sacrificing, Come! give flesh for the priest's roastings, - for he will not take of thee boiled flesh - only raw.