Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 32
Sanskrit:
तस्यानुधावतो रेतश्चस्कन्दामोघरेतस: । शुष्मिणो यूथपस्येव वासितामनुधावत: ॥ ३२ ॥
ITRANS:
tasyānudhāvato retaścaskandāmogha-retasaḥśuṣmiṇo yūthapasyevavāsitām anudhāvataḥ
Translation:
Just as a maddened bull elephant follows a female elephant who is able to conceive pregnancy, Lord Śiva followed the beautiful woman and discharged semen, even though his discharge of semen never goes in vain.