Shiva Purana
तद्रूपं च तदा दृष्ट्वा सर्वे पूतास्ततस्स्वयम् ॥ कृतवान्राघवः पूजां शिवधर्मपरायणः ॥ ३५ ॥
On seeing that form, they became sanctified. Rāma himself, interested in Saiva cult, performed the worship.
english translation
tadrUpaM ca tadA dRSTvA sarve pUtAstatassvayam ॥ kRtavAnrAghavaH pUjAM zivadharmaparAyaNaH ॥ 35 ॥
hk transliteration by Sanscript