כִּ֤י ׀ כְּמוֹ־שָׁעַ֥ר בְּנַפְשׁ֗וֹ כֶּ֫ן־ה֥וּא אֱכֹ֣ל וּ֭שְׁתֵה יֹ֣אמַר לָ֑ךְ וְ֝לִבּ֗וֹ בַּל־עִמָּֽךְ׃
For as one that hath reckoned within himself, so is he: ‘Eat and drink’, saith he to thee; But his heart is not with thee.
Read halakhic rulings (Jewish law) on Proverbs 23:7 from the Mishneh Torah and classical halakhic sources, free online.