Shiva Purana

siva.sh/siva-purana/vishweshwara-samhita/20/29

इमा रुद्रा येति ऋचा कुर्यात्फलसमर्पणम् । नमो व्रज्यायेति ऋचा सकलं शंभवेर्पयेत् २९ ।

sanskrit

Fruit shall be offered with the mantra “Imā Rudrāya”[36]. Everything shall be dedicated to Śiva with the mantra “Namo Vrajyāya”[37] etc.

english translation

imA rudrA yeti RcA kuryAtphalasamarpaNam | namo vrajyAyeti RcA sakalaM zaMbhaverpayet 29 |

hk transliteration by Sanscript