Yajna-sistasinah santa mucyante sarva-kilbisaih
bhunjate te tv aghampapa
ye pacanty atma-karanat
(Text 13, Ch 3, Karma Yoga)
Meaning: The devotees of the Lord are released from all kinds of sins because they eat food which is offered first for sacrifice. Others, who prepare food for personal sense enjoyment, verily eat only sin.