Shiva Purana
विघ्नेशादित्यविष्णूनामंबायाश्च शिवस्य च । शिवस्यशिवलिंगं च सर्वदा पूजयेद्द्विज ८ ।
The five deities Gaṇeśa, Sun, Viṣṇu, Pārvatī and Śiva shall be usually worshipped in their images. But a brahmin shall always worship the phallic emblem of Śiva.
english translation
vighnezAdityaviSNUnAmaMbAyAzca zivasya ca । zivasyazivaliMgaM ca sarvadA pUjayeddvija 8 ।
hk transliteration by Sanscript