Matsya Purana — The Maheshvara Vow: Śiva-Caturdaśī Vrata
*नन्दिकेश्वर उवाच शृणुष्वावहितो ब्रह्मन् वक्ष्ये माहेश्वरं व्रतम् त्रिषु लोकेषु विख्याता नाम्ना शिवचतुर्दशी //
*nandikeśvara uvāca śṛṇuṣvāvahito brahman vakṣye māheśvaraṃ vratam triṣu lokeṣu vikhyātā nāmnā śivacaturdaśī //
Nandikeśvara said: “Listen attentively, O Brahman; I shall explain the Māheśvara vow. It is renowned throughout the three worlds by the name ‘Śiva-caturdaśī’—the fourteenth day sacred to Śiva.”
This verse does not discuss pralaya; it introduces a ritual vow (vrata) dedicated to Śiva, emphasizing its fame across the three worlds.
It frames the Maheshvara vow as a widely revered observance; in Purāṇic dharma, such vratas are recommended disciplines for householders (and rulers) to cultivate devotion, restraint, and merit through regulated worship.
The ritual significance is explicit: the text announces instruction on the Māheśvara vrata known as Śiva-caturdaśī, indicating a tithi-based Śaiva observance (typically involving fasting, vigil, and Śiva worship in the broader tradition).