Chapter 4 · verse 31 · gita.yoga.org
Bhagavad Gita 4.31
यज्ञशिष्टामृतभुजो यान्ति ब्रह्म सनातनम्। नायं लोकोऽस्त्ययज्ञस्य कुतो़ऽन्यः कुरुसत्तम
Those who eat the remnants of the sacrifice, which are like nectar, go to the eternal Brahman. This world is not for the one who does not perform sacrifice; how then can they have the other, O Arjuna?