Shiva Purana
दक्षिणं नीलजीमूतसदृशं घोरदर्शनम् ॥ उत्तरं विद्रुमप्रख्यं नीलालकविभूषितम् ॥ २२ ॥
The southern face resembles the blue cloud and has a terrific appearance. The northern face has the lustre of coral and is bedecked with dark forelocks.
english translation
dakSiNaM nIlajImUtasadRzaM ghoradarzanam ॥ uttaraM vidrumaprakhyaM nIlAlakavibhUSitam ॥ 22 ॥
hk transliteration by Sanscript