Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/11/14

नैमिषारण्यतीर्थे तु निखिलर्षिप्रतिष्ठितम् ।। ऋषीश्वरमिति ख्यातं शिवलिंगं सुखप्रदम् ।। १४।।

sanskrit

The phallic image of Śiva known as Ṛṣīśvara installed by the sages in the holy centre of Naimiṣa forest, yields happiness.

english translation

naimiSAraNyatIrthe tu nikhilarSipratiSThitam || RSIzvaramiti khyAtaM zivaliMgaM sukhapradam || 14||

hk transliteration by Sanscript