Shiva Purana
एवं ब्रह्माणमभ्यर्च्य त्रिभिरावरणैर्युतम् ॥ दक्षिणे पश्चिमे पश्चाद्रुद्रं सावरणं यजेत् ॥ ५० ॥
After worshipping Brahmā endowed with the three Āvaraṇas, in this manner in the south, he shall worship Rudra in the west along with the Āvaraṇas.
english translation
evaM brahmANamabhyarcya tribhirAvaraNairyutam ॥ dakSiNe pazcime pazcAdrudraM sAvaraNaM yajet ॥ 50 ॥
hk transliteration by Sanscript