Shiva Purana — Rudra Samhita, Shloka 53
देवस्तुतिः—नन्दिकेश्वरविज्ञप्तिः—शम्भोः समाधेः उत्थानम्
Devas’ Hymn, Nandikeśvara’s Petition, and Śiva’s Rising from Samādhi
नारदस्य निर्देशात्सा करोति कठिनं तपः । तत्तेजसाखिलं व्याप्तं त्रैलोक्यं सचराचरम्
nāradasya nirdeśātsā karoti kaṭhinaṃ tapaḥ | tattejasākhilaṃ vyāptaṃ trailokyaṃ sacarācaram
依那罗陀（Nārada）的指示，她修行极其严峻的苦行（tapas）。由此苦行所生的光威遍满三界——一切动与不动之众，尽皆被其所充塞。
Suta Goswami (narrating to the sages at Naimisharanya)
Tattva Level: pati
Shiva Form: Umāpati
Sthala Purana: Not a Jyotirliṅga legend; it is the tapas-episode of Pārvatī: under Nārada’s guidance she performs intense austerity whose tejas pervades the three worlds, compelling the cosmic order toward Śiva–Śakti union.
Significance: Models sādhana: tapas guided by guru-like instruction (Nārada) becomes a vehicle for anugraha—Śiva’s grace responding to purified intention; inspires vrata/japa and disciplined worship for marital/inner union with the divine.
Shakti Form: Pārvatī
Role: liberating
FAQs
It presents tapas as a concentrated, God-oriented discipline that generates tejas (spiritual radiance), showing that sincere striving toward Shiva transforms not only the seeker but also the surrounding cosmic order.
Pārvatī’s tapas is directed toward attaining Shiva in a personal (saguṇa) relationship; in Linga-worship, the same principle applies—steady devotion and disciplined practice make the devotee’s inner consciousness receptive to Shiva’s grace.
A practical takeaway is disciplined japa (especially the Panchakshara, “Om Namaḥ Śivāya”) with austerity such as fasting/vigil on Mahāśivarātri, along with Shaiva purity practices like Tripuṇḍra (bhasma) and focused meditation.