וְהֵסִ֥יר אֶת־מֻרְאָת֖וֹ בְּנֹצָתָ֑הּ וְהִשְׁלִ֨יךְ אֹתָ֜הּ אֵ֤צֶל הַמִּזְבֵּ֙חַ֙ קֵ֔דְמָה אֶל־מְק֖וֹם הַדָּֽשֶׁן׃
And he shall take away its crop with the feathers thereof, and cast it beside the altar on the east part, in the place of the ashes.
Read kabbalistic (mystical) interpretation of Leviticus 1:16: and classical mystical sources.