Shiva Purana
यथा पुरीषु सर्वासु काशीश्रेष्ठतमा स्मृता । तथा सर्वेषु लिंगेषु पार्थिवं श्रेष्ठमुच्यते १३ ।
Just as Kāśī is considered the most excellent of all holy cities, so also the earthly phallic image of Śiva is spoken of as the most excellent of all other phallic images.
english translation
yathA purISu sarvAsu kAzIzreSThatamA smRtA । tathA sarveSu liMgeSu pArthivaM zreSThamucyate 13 ।
hk transliteration by Sanscript