Shiva Purana
ताभ्यां संप्रार्थितश्शंभुः पार्थिवे पूजनाय वै ॥ आयाति नित्यं तल्लिंगे भक्ताधीनतया शिव ॥ २॥
Requested by them for their worship, Śiva, being subservient to the devotees comes every day to that earthen phallic image of Śiva.
english translation
tAbhyAM saMprArthitazzaMbhuH pArthive pUjanAya vai ॥ AyAti nityaM talliMge bhaktAdhInatayA ziva ॥ 2॥
hk transliteration by Sanscript