Shiva Purana
दृष्ट्वैवममरा हृष्टाः पदंतत्पारमेश्वरम् । प्रणेमुः प्रणवाकारं प्रविष्टास्तत्र सद्मनि २३ ।
On seeing that region of Parameśvara in the shape of Oṃkāra they bent their heads down in reverence and entered the palace.
english translation
dRSTvaivamamarA hRSTAH padaMtatpAramezvaram । praNemuH praNavAkAraM praviSTAstatra sadmani 23 ।
hk transliteration by Sanscript