וְשָׂרַ֥ף אֶת־הַפָּרָ֖ה לְעֵינָ֑יו אֶת־עֹרָ֤הּ וְאֶת־בְּשָׂרָהּ֙ וְאֶת־דָּמָ֔הּ עַל־פִּרְשָׁ֖הּ יִשְׂרֹֽף׃
And the heifer shall be burnt in his sight; her skin, and her flesh, and her blood, with her dung, shall be burnt.
Read kabbalistic (mystical) interpretation of Numbers 19:5: and classical mystical sources.