חָלְק֤וּ ׀ מַחְמָאֹ֣ת פִּיו֮ וּֽקֲרָב־לִ֫בּ֥וֹ רַכּ֖וּ דְבָרָ֥יו מִשֶּׁ֗מֶן וְהֵ֣מָּה פְתִחֽוֹת׃
Smoother than cream were the speeches of his mouth, But his heart was war; His words were softer than oil, Yet were they keen-edged swords.
Read halakhic rulings (Jewish law) on Psalms 55:22: and classical halakhic sources.