Chapter 4 · Knowledge and Renunciation of Action · Krishna said
Bhagavad Gita 4.31 — The nectar of yajna
यज्ञशिष्टामृतभुजो यान्ति ब्रह्म सनातनम्। नायं लोकोऽस्त्ययज्ञस्य कुतोऽन्यः कुरुसत्तम ॥
yajñaśiṣṭāmṛtabhujo yānti brahma sanātanam | nāyaṃ loko'styayajñasya kuto'nyaḥ kurusattama ||
Meaning
Those who partake of what remains of yajna, like nectar, reach the eternal Brahman. Arjuna, even this world is not for one who offers nothing — how then the next?