Bhagavad Gita · 4.31

यज्ञशिष्टामृतभुजो यान्ति ब्रह्म सनातनम्।नायं लोकोऽस्त्ययज्ञस्य कुतोऽन्यः कुरुसत्तम॥

yajña-śhiṣhṭāmṛita-bhujo yānti brahma sanātanam nāyaṁ loko 'sty ayajñasya kuto 'nyaḥ kuru-sattama

Those who partake of the nectar of the remnants of sacrifice attain the eternal Brahman. O best of the Kurus, even this world is not for one who does not sacrifice — how then the other world?

— Bhagavad Gita 4.31

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)