Shiva Purana
परमात्मन इत्येवं प्रोच्य प्रार्थ्यं च तान्यतिः ॥ श्रद्धया चरणन्तेषां कुर्य्याद्याथार्थ्यमादरात् ॥ ३४ ॥
Having thus spoken of the Supreme Soul he offered them prayers With faith and respect one should treat them at their feet.
english translation
paramAtmana ityevaM procya prArthyaM ca tAnyatiH ॥ zraddhayA caraNanteSAM kuryyAdyAthArthyamAdarAt ॥ 34 ॥
hk transliteration by Sanscript