Shiva Purana — Satarudra Samhita, Shloka 22
उपमन्युकुमारस्य क्षीरार्थ-प्रार्थना तथा शिवप्रसाद-निबन्धनम् | Upamanyu’s Longing for Milk and the Doctrine of Shiva’s Grace
ततः साम्बः शिवः शक्रस्वरूपस्सगणो द्रुतम् । जगामानुग्रहं कर्तुमुपमन्योस्तदाश्रमम् । परीक्षितुं च तद्भक्तिं शक्ररूपधरो हरः । प्राह गंभीरया वाचा बालकन्तं मुनीश्वर
tataḥ sāmbaḥ śivaḥ śakrasvarūpassagaṇo drutam | jagāmānugrahaṃ kartumupamanyostadāśramam | parīkṣituṃ ca tadbhaktiṃ śakrarūpadharo haraḥ | prāha gaṃbhīrayā vācā bālakantaṃ munīśvara
随后，三婆湿婆——即大自在天湿婆本尊——偕同眷属迅疾前往优波摩纽（Upamanyu）的精舍，化作释迦罗（Śakra，即因陀罗）之相，为施加慈恩。哈罗（Hara）为试验其信奉之坚固，亦持释迦罗之形，以深沉之声对那童子优波摩纽说道：噢，诸牟尼之最胜者。
Suta Goswami (narrating to the sages at Naimisharanya)
Tattva Level: pati
Shiva Form: Mahādeva
Role: liberating
Cosmic Event: Descent-to-āśrama motif: the transcendent Lord entering the devotee’s limited sphere to convert tapas into grace
FAQs
It highlights Śiva’s anugraha (grace) and his compassionate testing of a devotee: true bhakti is proven when devotion remains steady even under divine disguise and challenge, leading the soul toward Śiva’s liberating favor.
Śiva appears in a tangible, assumable form (Śakra-rūpa), showing Saguna Śiva’s accessibility to devotees; such līlās reinforce that Linga-worship and personal devotion are met by Śiva’s responsive presence and grace.
The takeaway is steadfast bhakti and japa even when faith is tested—especially continuous Panchākṣarī mantra practice ("Om Namaḥ Śivāya") with humility, supported by simple Shaiva disciplines like bhasma (tripuṇḍra) and devotion-centered worship.