Mahabharata 12.240.7
कदाचिल्लभते प्रीतिं कदाचिदपि शोचतेन सुखेन न दुःखेन कदाचिदिह युज्यते
kadācillabhate prītiṃ kadācidapi śocatena sukhena na duḥkhena kadācidiha yujyate
Our plain-language meaning of this verse is waiting for scholar review.
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