Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/1/16

यत्रयत्र यदा शंभुर्भक्त्या भक्तैश्च संस्मृतः ।। तत्रतत्रावतीर्याथ कार्यं कृत्वा स्थितस्तदा ।। १६ ।।

sanskrit

Śiva incarnates in those places wherever he is devoutly remembered by the devotees. After carrying out their task he stations himself there.

english translation

yatrayatra yadA zaMbhurbhaktyA bhaktaizca saMsmRtaH || tatratatrAvatIryAtha kAryaM kRtvA sthitastadA || 16 ||

hk transliteration by Sanscript