It is said that Greek philosopher Plato would fast for ten days or more and that the mathematician Pythagoras made his students fast before he taught them.
किसी समय का भोजन न करना या किसी ख़ास तरह के भोजन से दूर रहना अनेक लोगों द्वारा उपवास करना समझा जाता है ।