Shiva Purana
ॐ ह्रीमिति समुच्चार्य्य नैवेद्यं वह्निजायया ॥ पानीयं नम इत्युक्त्वा परम्प्रेम्णा समर्पयेत् ॥ २३ ॥
Naivedya shall be offered with; “Om Hrīm Svāhā”. With “Namaḥ” water shall be offered with great devotion.
english translation
OM hrImiti samuccAryya naivedyaM vahnijAyayA ॥ pAnIyaM nama ityuktvA parampremNA samarpayet ॥ 23 ॥
hk transliteration by Sanscript