וְלָקַ֣ח מְלֹֽא־הַ֠מַּחְתָּה גַּֽחֲלֵי־אֵ֞שׁ מֵעַ֤ל הַמִּזְבֵּ֙חַ֙ מִלִּפְנֵ֣י יְהוָ֔ה וּמְלֹ֣א חָפְנָ֔יו קְטֹ֥רֶת סַמִּ֖ים דַּקָּ֑ה וְהֵבִ֖יא מִבֵּ֥ית לַפָּרֹֽכֶת׃
And he shall take a censer full of coals of fire from off the altar before the LORD, and his hands full of sweet incense beaten small, and bring it within the veil.
Read kabbalistic (mystical) interpretation of Leviticus 16:12: and classical mystical sources.