וְהַכְּלָבִ֣ים עַזֵּי־נֶ֗פֶשׁ לֹ֤א יָֽדְעוּ֙ שָׂבְעָ֔ה וְהֵ֣מָּה רֹעִ֔ים לֹ֥א יָדְע֖וּ הָבִ֑ין כֻּלָּם֙ לְדַרְכָּ֣ם פָּנ֔וּ אִ֥ישׁ לְבִצְע֖וֹ מִקָּצֵֽהוּ׃
Yea, the dogs are greedy, They know not when they have enough; And these are shepherds That cannot understand; They all turn to their own way, Each one to his gain, one and all.
Read halakhic rulings (Jewish law) on Isaiah 56:11: and classical halakhic sources.