וְלָקַ֥ח הַכֹּהֵ֖ן מִלֹּ֣ג הַשָּׁ֑מֶן וְיָצַ֛ק עַל־כַּ֥ף הַכֹּהֵ֖ן הַשְּׂמָאלִֽית׃
And the priest shall take of the log of oil, and pour it into the palm of his own left hand.
Read kabbalistic (mystical) interpretation of Leviticus 14:15: and classical mystical sources.