4:31  

यज्ञशिष्टामृतभुजो यान्ति ब्रह्म सनातनम् ।
नायं लोकोऽस्त्ययज्ञस्य कुतोऽन्यः कुरुसत्तम ॥४-३१॥

yadnyashiShTaamRRitabhujo yaanti brahma sanaatanam ।

naayaM loko'styayadnyasya kuto'nyaH kurusattama ॥४-३१॥

Source: Automatic ITRANS Transliteration

Tasters of the nectar of sacrificial remains achieve the eternal Brahma.
This world is not for the non-sacrificer. What of another, O best of the Kurus?

Source: Milind S. Pandit

Those who perform Yajna obtain the nectar (of knowledge) as a result of their sacrifice and attain eternal Brahman. O Arjuna, even this world is not (a happy place) for the non-sacrificer, how can the other world be? (See also 4.38, and 5.06).

Source: The Bhagavad-Gita: The Sacred Song

O best of the Kuru dynasty, without sacrifice one can never live happily on this planet or in this life: what then of the next?

Source: Bhagavad Gita As It Is