שירת העשבים

"For every shepherd and shepherd has a special melody according to the plants and the place where he shepherds … because every herb and grass has a song that it says in its chapter of Perek Shira, and the singing of the weeds becomes the song of the shepherd … Therefore, King David Z"L, who was a musician, was also a shepherd. And in Pirkei Avos we find a whole world who were also shepherd as it says "We hear songs and melodies coming out of the wings of the earth" because by the plants that grow in the land, we will make a melody like this"

Likutei Moharan, Tanina, Tora 63