tasya - of him (Lord Śiva); anudhāvataḥ - who was following; retaḥ - the semen; caskanda - discharged; amogha-retasaḥ - of that person whose discharge of semen never goes in vain; śuṣmiṇaḥ - mad; yūthapasya - of a male elephant; iva - just like; vāsitām - to a female elephant able to conceive pregnancy; anudhāvataḥ - following.

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.