Shiva Purana
तस्मादभ्यर्चयेनित्यं शिवमादित्यरूपिणम् ॥ धर्मकामार्थमुक्त्यर्थं मनसा कर्मणा गिरा ॥ ३७ ॥
Hence for the sake of virtue, wealth, love and salvation, one shall mentally verbally and physically worship Śiva in the form of the sun.
english translation
tasmAdabhyarcayenityaM zivamAdityarUpiNam ॥ dharmakAmArthamuktyarthaM manasA karmaNA girA ॥ 37 ॥
hk transliteration by Sanscript