Leviticus 1:9

But his inwards. — Before, however, the cut-up victim was thus arranged to be burnt, the stomach, the bowels, and the feet had to be thoroughly cleansed. In the time of the second Temple, the washing had to be repeated three times before the ablution was deemed complete.

And the priest shall burn. — The word here used is not the one generally used to denote consuming by fire, but it originally signifies to make a fume or vapour by incense. It is used in connection with all sacrifices (Leviticus 2:2; Leviticus 2:9; Leviticus 3:5; Leviticus 3:11; Leviticus 4:10; Leviticus 4:19; Leviticus 6:8; Leviticus 7:5, &c.) and the idea intended to be conveyed thereby is, that man upon earth fitly brought his gift to God in heaven, by causing the odour emitted from the burning sacrifice to ascend in a sweet-smelling savour to heaven.