ŚB 9.20.17

अमोघवीर्यो राजर्षिर्महिष्यां वीर्यमादधे ।
श्वोभूते स्वपुरं यात: कालेनासूत सा सुतम् ॥ १७ ॥
amogha-vīryo rājarṣir
mahiṣyāṁ vīryam ādadhe
śvo-bhūte sva-puraṁ yātaḥ
kālenāsūta sā sutam

Synonyms

amogha-vīryaḥa person who discharges semen without being baffled, or, in other words, who must beget a child; rāja-ṛṣiḥthe saintly King Duṣmanta; mahiṣyāminto the Queen, Śakuntalā (after her marriage, Śakuntalā became the Queen); vīryamsemen; ādadheplaced; śvaḥ-bhūtein the morning; sva-puramto his own place; yātaḥreturned; kālenain due course of time; asūtagave birth; she (Śakuntalā); sutamto a son.

Translation

King Duṣmanta, who never discharged semen without a result, placed his semen at night in the womb of his Queen, Śakuntalā, and in the morning he returned to his palace. Thereafter, in due course of time, Śakuntalā gave birth to a son.