Where does Peilin come from the Book of Songs?

The Story of the Four Sages.

Pei Lin is taken from the idiom Peiyu Ganlin, which means abundant and sweet rain. A metaphor for deep kindness. From the Book of Songs, The Four Sages.

The Book of Songs is the beginning of ancient Chinese poetry and the earliest poetry collection. It collects poems from the early Western Zhou Dynasty to the middle of the Spring and Autumn Period (11th century BC to 6th century BC), with a total of 311 poems.