וְהִקְטִירָ֥ם הַכֹּהֵ֖ן הַמִּזְבֵּ֑חָה לֶ֤חֶם אִשֶּׁה֙ לְרֵ֣יחַ נִיחֹ֔חַ כָּל־חֵ֖לֶב לַיהוָֽה׃
And the priest shall make them smoke upon the altar; it is the food of the offering made by fire, for a sweet savour; all the fat is the LORD’S.
Read kabbalistic (mystical) interpretation of Leviticus 3:16: and classical mystical sources.