Shiva Purana
भुक्तिमुक्तिप्रदं लिंगं विविधापन्निवारणम् । पूजयित्वा नरो नित्यं शिवसायुज्यमाप्नुयात् २६ ।
The phallic image yields worldly pleasures and salvation. It wards off different sorts of mishaps. By worshipping it, man attains identity with Śiva.
english translation
bhuktimuktipradaM liMgaM vividhApannivAraNam । pUjayitvA naro nityaM zivasAyujyamApnuyAt 26 ।
hk transliteration by Sanscript