Shiva Purana
शांतेन वा तथान्यैश्च वेदमन्त्रैश्च कृत्स्नशः ॥ पूजयेत्परमं देवं केवलेन शिवेन वा ॥ ३९ ॥
Or by chanting peaceful words and other Vedic mantras in their entirety One should worship the Supreme Lord with Lord Shiva alone.
english translation
zAMtena vA tathAnyaizca vedamantraizca kRtsnazaH ॥ pUjayetparamaM devaM kevalena zivena vA ॥ 39 ॥
hk transliteration by Sanscript