וְאֶת־בְּשַׂ֤ר הַפָּר֙ וְאֶת־עֹר֣וֹ וְאֶת־פִּרְשׁ֔וֹ תִּשְׂרֹ֣ף בָּאֵ֔שׁ מִח֖וּץ לַֽמַּחֲנֶ֑ה חַטָּ֖את הֽוּא׃
Targum Jonathan on Exodus
And the flesh of the bullock, and his skin, and his dung, thou shalt burn with fire without the camp; it is a sin offering.