Shiva Purana
वेदोक्ताविधिना सम्यक्संपूर्णफलसिद्धये । पूजयेत्परया भक्त्या पार्थिवं लिंगमुत्तमम् ४ ।
With great devotion he shall then worship the excellent earthen phallic image according to Vedic injunctions in order to realise the full benefit.
english translation
vedoktAvidhinA samyaksaMpUrNaphalasiddhaye । pUjayetparayA bhaktyA pArthivaM liMgamuttamam 4 ।
hk transliteration by Sanscript