Bhagavad Gita 4.31
Tasting the nectar of immortality, as the reward of sacrifice, they reach the Eternal. This world is not for those who refuse to sacrifice; nor is the other world.
यज्ञशिष्टामृतभुजो यान्ति ब्रह्म सनातनम्।
नायं लोकोऽस्त्ययज्ञस्य कुतो़ऽन्यः कुरुसत्तम॥yajñaśiṣṭāmṛtabhujo yānti brahma sanātanam|
nāyaṃ loko'styayajñasya kuto़'nyaḥ kurusattama||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).