Shiva Purana — Rudra Samhita, Shloka 1
संध्यायाः शुद्धिः सूर्यलोकप्रवेशश्च — Purification of Sandhyā and Her Entry into the Solar Sphere
ब्रह्मोवाच । वरं दत्त्वा मुने तस्मिन् शंभावंतर्हिते तदा । संध्याप्यगच्छत्तत्रैव यत्र मेधातिथिर्मुनिः
brahmovāca | varaṃ dattvā mune tasmin śaṃbhāvaṃtarhite tadā | saṃdhyāpyagacchattatraiva yatra medhātithirmuniḥ
梵天曰：向那位牟尼赐下恩许之后，当主宰商婆（Śambhu，湿婆）隐没不见之时，那牟尼便去行暮时礼拜（sandhyā-vandana），并前往正是圣者梅陀提提（Medhātithi）所在之处。
Brahma
Tattva Level: pashu
Shiva Form: Mahādeva
FAQs
It shows that even after a direct divine encounter and receiving a boon, the devotee remains grounded in niyama (disciplined observance) like sandhyā worship—devotion is sustained through regular practice, not only extraordinary visions.
Śambhu’s appearing and then becoming hidden highlights Saguna grace (Śiva accessible to the devotee) while also indicating transcendence—Śiva is not bound to form or constant visibility; worship continues through rites and remembrance even when He is unseen.
Sandhyā worship at the junctions of day (dawn/dusk) is implied—regular japa, purification, and prayerful recollection of Śiva as part of daily sādhana.