The right of your stomach is that you make it not into a container for that which is unlawful to you and you eat no more than your fill (shib’).

وَأَمَّا حَقُّ بَطْنِكَ فَأَنْ لا تَجْعَلَهُ وِعَاءً لِلْحَرَامِ وَلا تَزيد على الشَّبْعَ.