וְעַתָּ֖ה קְחוּ־לִ֣י מְנַגֵּ֑ן וְהָיָה֙ כְּנַגֵּ֣ן הַֽמְנַגֵּ֔ן וַתְּהִ֥י עָלָ֖יו יַד־יְהוָֽה׃
«現在你們給我找一個彈琴的人來。»彈琴的人彈琴的時候，永恆者的手就降在以利沙身上。
Orchot Tzadikim
The Divine Presence does not rest upon any one unless there is joy (Shabbath 30b). And all of the prophets did not prophesy at such times as they desired, but they would prepare their minds and sit joyous and glad of heart and then prophesy, for Prophecy does not dwell where idleness or sadness is found, but only where joy is. Therefore, the pupils of the Prophets would place before them lyre, drum and harp and sought by their means the gift of Prophecy, as it is written "And it came to pass, when the minstrel played, that the hand of the Lord came upon him" (II Kings 3:15).