וְאֶת־הַפָּ֤ר וְאֶת־עֹרוֹ֙ וְאֶת־בְּשָׂר֣וֹ וְאֶת־פִּרְשׁ֔וֹ שָׂרַ֣ף בָּאֵ֔שׁ מִח֖וּץ לַֽמַּחֲנֶ֑ה כַּאֲשֶׁ֛ר צִוָּ֥ה יְהוָ֖ה אֶת־מֹשֶֽׁה׃
But the bullock, and its skin, and its flesh, and its dung, were burnt with fire without the camp; as the LORD commanded Moses.
Read kabbalistic (mystical) interpretation of Leviticus 8:17: and classical mystical sources.