Bhagavad Gita 4.30
Others, controlling their diet, sacrifice their worldly life to the spiritual fire. All understand the principle of sacrifice, and by it their sins are washed away.
अपरे नियताहाराः प्राणान्प्राणेषु जुह्वति।
सर्वेऽप्येते यज्ञविदो यज्ञक्षपितकल्मषाः॥apare niyatāhārāḥ prāṇānprāṇeṣu juhvati|
sarve'pyete yajñavido yajñakṣapitakalmaṣāḥ||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).