לֵאמֹ֡ר הֵ֣ן יְשַׁלַּ֣ח אִ֣ישׁ אֶת־אִשְׁתּוֹ֩ וְהָלְכָ֨ה מֵאִתּ֜וֹ וְהָיְתָ֣ה לְאִישׁ־אַחֵ֗ר הֲיָשׁ֤וּב אֵלֶ֙יהָ֙ ע֔וֹד הֲל֛וֹא חָנ֥וֹף תֶּחֱנַ֖ף הָאָ֣רֶץ הַהִ֑יא וְאַ֗תְּ זָנִית֙ רֵעִ֣ים רַבִּ֔ים וְשׁ֥וֹב אֵלַ֖י נְאֻם־יְהֹוָֽה׃
說：人若休了妻子，她離開他，嫁給了別人，前夫還能再回到她那裡嗎？那地豈不大受玷污嗎？你雖然與許多情人行淫，仍要歸向我。這是永恆者說的。
Sha'arei Kedusha
Flattery and hypocrisy are just as bad as idolatry, forbidden relations, adultery and murder. From where do we learn that it is equal to idolatry? From the verse,623Isaiah 32:6 “For the vile person speaks villainy and his heart plans iniquity, to act with hypocrisy and to speak falsehood about HaShem-יהו״ה.” From where do we learn that it is equal to forbidden relations and adultery? From the verse,624Jeremiah 3:1 “If a man divorces his wife and she goes from him and is with another man, can he return to her again? Would that not surely bring the profound guilt of hypocrisy upon the land?” From where do we know that it is equal to murder? From the verse,625Psalms 106:38 “They spilled innocent blood… and the land was polluted by the blood of hypocrisy.”