וְעָרְכ֗וּ בְּנֵ֤י אַהֲרֹן֙ הַכֹּ֣הֲנִ֔ים אֵ֚ת הַנְּתָחִ֔ים אֶת־הָרֹ֖אשׁ וְאֶת־הַפָּ֑דֶר עַל־הָעֵצִים֙ אֲשֶׁ֣ר עַל־הָאֵ֔שׁ אֲשֶׁ֖ר עַל־הַמִּזְבֵּֽחַ׃
And Aaron’s sons, the priests, shall lay the pieces, and the head, and the suet, in order upon the wood that is on the fire which is upon the altar;
Read kabbalistic (mystical) interpretation of Leviticus 1:8: and classical mystical sources.