Skanda Purana — Prabhasa Khanda, Shloka 110
तीर्थोपनिषदः ख्याता लिंगोपनिषदस्तथा । योगोपनिषदो देवि पूर्वं वै कथितास्तव
tīrthopaniṣadaḥ khyātā liṃgopaniṣadastathā | yogopaniṣado devi pūrvaṃ vai kathitāstava
《圣地奥义书》（Tīrtha-Upaniṣad）广为人知，《林伽奥义书》（Liṅga-Upaniṣad）亦复如是；诸《瑜伽奥义书》亦然，女神啊——这些确已在先前为你详加开示。
Śiva
Tirtha: Prabhāsa-kṣetra (contextual)
Type: kshetra
Listener: Pārvatī
Scene: Śiva enumerates three ‘Upaniṣads’—Tīrtha, Liṅga, and Yoga—signaling a triadic map of outer pilgrimage, icon-worship, and inner realization; Pārvatī receives the classification.
FAQs
Pilgrimage (tīrtha), liṅga devotion, and yoga are treated as profound, ‘upaniṣadic’ inner teachings.
Prabhāsa-kṣetra is the contextual tīrtha; the verse also generalizes the sanctity of tīrthas as a category.
No direct prescription; it references prior instruction on tīrtha-sevā, liṅga-upāsanā, and yoga.