《太平广记·卷九十三·异僧七》
佛窟的第二层安放的是牛头旃檀，第三层安放的是金像，第四层是玉像，第五层是铜像。
第二头牛头旃檀，第三金，第四玉，第五铜像。
The second level of the grotto houses the sandalwood of the ox head, the third level houses the golden statue, the fourth level is the jade statue, and the fifth level is the bronze statue.