Shiva Purana
आसनानि च भद्राणि गजदंतमयानि च ॥ सुवर्णरत्नयुक्तानि चित्राण्यास्तरणानि च ॥ २५ ॥
Seats of ivory framed in gold and set with gems and the covering cloths of various colours shall be used.
english translation
AsanAni ca bhadrANi gajadaMtamayAni ca ॥ suvarNaratnayuktAni citrANyAstaraNAni ca ॥ 25 ॥
hk transliteration by Sanscript