《礼记·月令》
与土相配的动物是课虫。与土相配的五声是宫，相应的音律是黄钟之宫。
其虫裸，其音宫，律中黄钟之宫。
The animals associated with the earth element are ants and worms. The musical note associated with the earth element is gong, and the corresponding musical scale is the huang zhong gong.