Mahabharata 3.219.38

या जनित्री त्वप्सरसां गर्भमास्ते प्रगृह्य साउपविष्टं ततो गर्भं कथयन्ति मनीषिणः

yā janitrī tvapsarasāṃ garbhamāste pragṛhya sāupaviṣṭaṃ tato garbhaṃ kathayanti manīṣiṇaḥ

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