תִּכַּסֶּ֣ה שִׂ֭נְאָה בְּמַשָּׁא֑וֹן תִּגָּלֶ֖ה רָעָת֣וֹ בְקָהָֽל׃
Though his hatred be concealed with deceit, His wickedness shall be revealed before the congregation.
Read midrashic interpretation of Proverbs 26:26: and classical rabbinic exegesis.