Bhagavad Gita 3.13
यज्ञशिष्टाशिनः सन्तो मुच्यन्ते सर्वकिल्बिषैः।
भुञ्जते ते त्वघं पापा ये पचन्त्यात्मकारणात्।।3.13।।
Yagyashishtashinah santo muchyante sarvakilbishaih
Bhunjate te tvagham papa ye pachantyatmakaranat
Simple meaning, written by AIGood people who eat the remnant of sacrifice are freed from all sins. But sinful people who cook only for their own sake eat sin.