Likutei Moharan, Part II 63:3/ליקוטי מוהר"ן·תנינא ס״ג:ג׳

13. Thus, our forefather Yaakov—not knowing then that it was Yosef, but only what the tribes told him about Yosef’s conduct—sent him a melody suitable for such a minister, based on what he heard from his sons about his ways and conduct. Through the melody Yaakov wanted to get from him what he needed. He therefore sent him that melody of the Land of Israel.

2This is the meaning of what he said to his sons: “Take from the zimrot of the Land in your pouches”—i.e., they should take the aforementioned concept of melody, which is the concept of “zimrot of the Land,” in their pouches. “And bring down to the man as tribute some balsam and some honey, and gum, resin, pistachio nuts and almonds.” These are the concepts of the melody’s scale and rhythm, because the melody is created out of what grows in the Land, as mentioned above.