Bhagavad Gita 4.31

यज्ञशिष्टामृतभुजो यान्ति ब्रह्म सनातनम् |
नायं लोकोऽस्त्ययज्ञस्य कुतोऽन्यः कुरूसत्तम

Translation

Those who know the secret of sacrifice, and engaging in it, partake of its remnants that are like nectar, advance toward the Absolute Truth. O best of the Kurus, those who perform no sacrifice find no happiness either in this world or the next.