In which ancient book does a well-off society appear?

Book of Songs. According to the query of the World Wide Web, a well-off society first appeared in the book of songs, a classic of Chinese traditional studies. The specific language "The Book of Songs, Elegance and Civil Service" means that people will be well-off. People really work too hard, but they want a little health. The Book of Songs is the beginning of China's ancient poems and the earliest collection of poems, which collected poems from the early years of the Western Zhou Dynasty to the middle of the Spring and Autumn Period. There are 305 existing books in The Book of Songs, which are divided into three parts: Feng, Ya and Ode. The Book of Songs is rich in content, reflecting labor and love, war and corvee, oppression and resistance, customs and marriage, ancestor worship and feasting, and even astronomical phenomena, landforms, animals and plants. It is a mirror of the social life of the Zhou Dynasty.