The Rights of Allah against oneself
Risālat al-Ḥuqūq|Volume 1|Book 1|Chapter 2
وَأَمَّا حَقُّ بَطْنِكَ فَأَنْ لا تَجْعَلَهُ وِعَاءً لِلْحَرَامِ وَلا تَزيد على الشَّبْعَ.
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 after you become full.