Zevachim9: 6
וְכֻלָּם שֶׁפָּקְעוּ מֵעַל גַּבֵּי הַמִּזְבֵּחַ — לֹא יַחֲזִיר. וְכֵן גַּחֶלֶת שֶׁפָּקְעָה מֵעַל גַּבֵּי הַמִּזְבֵּחַ. אֵבָרִים שֶׁפָּקְעוּ מֵעַל גַּבֵּי הַמִּזְבֵּחַ, קֹדֶם לַחֲצוֹת — יַחֲזִיר, וּמוֹעֲלִין בָּהֶן; לְאַחַר חֲצוֹת, לֹא יַחֲזִיר — וְאֵין מוֹעֲלִין בָּהֶן.
[If] any of these were ejected from atop the Altar, they [need] not be returned. Similarly, an ember which was ejected from the Altar. Limbs [of offerings] which were ejected from the Altar — before midnight, [they] should be returned [to the Altar], and one is liable for me’ilah on their account; after midnight, they should not be returned [to the Altar], and one is not liable to me’ilah on their account.