וְלָקַחְתָּ֤ אֹתָם֙ מִיָּדָ֔ם וְהִקְטַרְתָּ֥ הַמִּזְבֵּ֖חָה עַל־הָעֹלָ֑ה לְרֵ֤יחַ נִיח֙וֹחַ֙ לִפְנֵ֣י יְהוָ֔ה אִשֶּׁ֥ה ה֖וּא לַיהוָֽה׃
And thou shalt take them from their hands, and make them smoke on the altar upon the burnt-offering, for a sweet savour before the LORD; it is an offering made by fire unto the LORD.
Read kabbalistic (mystical) interpretation of Exodus 29:25: and classical mystical sources.