Shiva Purana
अन्यात्मविदितं बाह्यमस्मदभ्यर्चनादिकम् ॥ तदेव तु स्वसंवेद्यमाभ्यंतरमुदाहृतम् ॥ ४९ ॥
My external worship is performed in the view of other persons. The same thing known and knowable to oneself alone is the internal worship.
english translation
anyAtmaviditaM bAhyamasmadabhyarcanAdikam ॥ tadeva tu svasaMvedyamAbhyaMtaramudAhRtam ॥ 49 ॥
hk transliteration by Sanscript