וְלֹֽא־תִשָּׁבְע֥וּ בִשְׁמִ֖י לַשָּׁ֑קֶר וְחִלַּלְתָּ֛ אֶת־שֵׁ֥ם אֱלֹהֶ֖יךָ אֲנִ֥י יְהוָֽה׃
And ye shall not swear by My name falsely, so that thou profane the name of thy God: I am the LORD.
Read kabbalistic (mystical) interpretation of Leviticus 19:12: and classical mystical sources.