Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/13/61

शिवयोश्च तथा कार्ये विशेषोऽत्र प्रदृश्यते ।। तदेव शृणु सुप्राज्ञ यथाहं वच्मि तेऽनघ ।। ६१ ।।

sanskrit

In the rites of Śiva and Śivā this difference is marked. O intelligent one, hear the same. O faultless one, I shall explain it now.

english translation

zivayozca tathA kArye vizeSo'tra pradRzyate || tadeva zRNu suprAjJa yathAhaM vacmi te'nagha || 61 ||

hk transliteration by Sanscript