Mahabharata 5.134.18

इदं पुंसवनं चैव वीराजननमेव चअभीक्ष्णं गर्भिणी श्रुत्वा ध्रुवं वीरं प्रजायते

idaṃ puṃsavanaṃ caiva vīrājananameva caabhīkṣṇaṃ garbhiṇī śrutvā dhruvaṃ vīraṃ prajāyate

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