אֶת־הַצִּפֹּ֤ר הַֽחַיָּה֙ יִקַּ֣ח אֹתָ֔הּ וְאֶת־עֵ֥ץ הָאֶ֛רֶז וְאֶת־שְׁנִ֥י הַתּוֹלַ֖עַת וְאֶת־הָאֵזֹ֑ב וְטָבַ֨ל אוֹתָ֜ם וְאֵ֣ת ׀ הַצִּפֹּ֣ר הַֽחַיָּ֗ה בְּדַם֙ הַצִּפֹּ֣ר הַשְּׁחֻטָ֔ה עַ֖ל הַמַּ֥יִם הַֽחַיִּֽים׃
As for the living bird, he shall take it, and the cedar-wood, and the scarlet, and the hyssop, and shall dip them and the living bird in the blood of the bird that was killed over the running water.
Read kabbalistic (mystical) interpretation of Leviticus 14:6: and classical mystical sources.