Mahabharata 3.200.29

ब्राह्मण उवाच · brāhmaṇa uvāca

कथं संभवते योनौ कथं वा पुण्यपापयोःजातीः पुण्या ह्यपुण्याश्च कथं गच्छति सत्तम

kathaṃ saṃbhavate yonau kathaṃ vā puṇyapāpayoḥjātīḥ puṇyā hyapuṇyāśca kathaṃ gacchati sattama

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