Skanda Purana — Prabhasa Khanda, Shloka 16
तमोभूते ततस्तत्र देवी दैत्यं तदा रुरुम् । शक्त्या बिभेद हृदये ततो मूर्छां जगाम ह
tamobhūte tatastatra devī daityaṃ tadā rurum | śaktyā bibheda hṛdaye tato mūrchāṃ jagāma ha
闇がその場に満ちるや、女神はシャクティ（聖なる槍）にてダイティヤのルルの胸心を貫いた。すると彼は気絶して倒れた。
Narrator (Purāṇic narrator, contextually Sūta/Lomaharṣaṇa speaking to sages)
Tirtha: Prabhāsa-kṣetra
Type: kshetra
Listener: Implied Devī-centered audience; prior address 'Deveśi' continues the frame
Scene: A field swallowed by darkness; at its center the Goddess thrusts a gleaming spear (śakti) into Ruru’s chest; the demon’s eyes roll as he collapses into faint; the spear’s light cuts the gloom.
FAQs
Even when darkness arises, divine power (śakti) decisively restores dharma by striking at the very ‘heart’ of adharma.
Prabhāsakṣetra, where the Goddess’s protective intervention is narrated as part of the site’s māhātmya.
None explicitly; the verse is a heroic māhātmya episode rather than a vrata instruction.