כִּ֤י פִ֪י רָשָׁ֡ע וּֽפִי־מִ֭רְמָה עָלַ֣י פָּתָ֑חוּ דִּבְּר֥וּ אִ֝תִּ֗י לְשׁ֣וֹן שָֽׁקֶר׃
For the mouth of the wicked and the mouth of deceit have they opened against me; They have spoken unto me with a lying tongue.
Read halakhic rulings (Jewish law) on Psalms 109:2: and classical halakhic sources.