Mishnayos Pesachim Perek 7 Mishnah 8

If the whole Paschal lamb or most of it became ritually impure, one burns it before the Temple [habira] with wood from the arrangement of wood on the altar that was given to the owners of the Paschal lamb for this purpose. If a minority of it became impure, and similarly, with regard to the parts of the Paschal lamb that are leftover, which must be burned, the owners of the Paschal lamb burn it in their courtyards or on their roofs, with their own wood. Only the miserly, who want to save the expenditure of wood, burn it before the Temple in order to benefit from the wood of the arrangement.

נִטְמָא שָׁלֵם אוֹ רֻבּוֹ, שׂוֹרְפִין אוֹתוֹ לִפְנֵי הַבִּירָה מֵעֲצֵי הַמַּעֲרָכָה. נִטְמָא מִעוּטוֹ, וְהַנּוֹתָר, שׂוֹרְפִין אוֹתוֹ בְחַצְרוֹתֵיהֶן אוֹ עַל גַּגּוֹתֵיהֶן מֵעֲצֵי עַצְמָן. הַצַּיְקָנִין שׂוֹרְפִין אוֹתוֹ לִפְנֵי הַבִּירָה, בִּשְׁבִיל לֵהָנוֹת מֵעֲצֵי הַמַּעֲרָכָה: