Shiva Purana
सर्वाननशिरोग्रीवः सर्वभूतगुहाशयः ॥ सर्वव्यापी च भगवांस्तस्मात्सर्वगतश्शिवः ॥ २० ॥
He has all faces, heads and necks. He lies in the cavity of the heart of all. He is all-pervading and present everywhere.
english translation
sarvAnanazirogrIvaH sarvabhUtaguhAzayaH ॥ sarvavyApI ca bhagavAMstasmAtsarvagatazzivaH ॥ 20 ॥
hk transliteration by Sanscript