Shiva Purana
अन्तःपुराधिपं साक्षान्नन्दिनं सम्यगर्चयेत् ॥ चामीकराचलप्रख्यं सर्वाभरणभूषितम् ॥ २३॥
One should properly worship Nandi, the lord of the inner palace himself. It was like a mountain of gold and adorned with all kinds of ornaments.
english translation
antaHpurAdhipaM sAkSAnnandinaM samyagarcayet ॥ cAmIkarAcalaprakhyaM sarvAbharaNabhUSitam ॥ 23॥
hk transliteration by Sanscript