Mahabharata 12.264.1

युधिष्ठिर उवाच · yudhiṣṭhira uvāca

बहूनां यज्ञतपसामेकार्थानां पितामहधर्मार्थं न सुखार्थार्थं कथं यज्ञः समाहितः

bahūnāṃ yajñatapasāmekārthānāṃ pitāmahadharmārthaṃ na sukhārthārthaṃ kathaṃ yajñaḥ samāhitaḥ

Our plain-language meaning of this verse is waiting for scholar review.