Shiva Purana
अघोरहृदयं तद्वद्वामगुह्यं महेश्वरम् ॥ सद्योजातं च तन्मूर्तिमष्टत्रिंशत्कलामयम् ॥ ६१ ॥
The heart of the ghastly is the same as the left-handed secret of the great Lord. That idol which was immediately born was composed of thirty-eight arts.
english translation
aghorahRdayaM tadvadvAmaguhyaM mahezvaram ॥ sadyojAtaM ca tanmUrtimaSTatriMzatkalAmayam ॥ 61 ॥
hk transliteration by Sanscript