Shiva Purana
एतन्मम पुरं दिव्यं गुह्याद्गुह्यतरं प्रिये ॥ ब्रह्मादयोऽपि जानंति माहात्म्यं नास्य पार्वति ॥ २१ ॥
O beloved, this divine city of mine is most mysterious one. O Pārvatī, even Brahmā and others do not know its greatness.
english translation
etanmama puraM divyaM guhyAdguhyataraM priye ॥ brahmAdayo'pi jAnaMti mAhAtmyaM nAsya pArvati ॥ 21 ॥
hk transliteration by Sanscript