Shiva Purana
अभ्यर्च्य स्नाप्य शुद्धोदैरभ्यर्च्य कुसुमादिभिः ॥ श्रीरुद्रचमकाभ्यां च रुद्रसूक्तेन च क्रमात् ॥ ४२ ॥
After worshiping him he bathed him with pure water and offered him flowers and other offerings Then chant the Śrī Rudra Chamaka and the Rudra Sūkta in this order.
english translation
abhyarcya snApya zuddhodairabhyarcya kusumAdibhiH ॥ zrIrudracamakAbhyAM ca rudrasUktena ca kramAt ॥ 42 ॥
hk transliteration by Sanscript