“When you kindle the lamps” – you find twelve tribes that presented offerings for the dedication of the altar. The tribe of Levi did not present anything, and they were troubled, and were saying: ‘Why were we distanced from presenting an offering for the dedication of the altar?’ This is analogous to a king who made a feast and he invited artisans. There was one who was beloved to him, whom he loved excessively, whom he did not invite with them.
He was troubled and was saying: ‘Does the king, perhaps have something in his heart against me, that he failed to invite me to any of these feasts?’ When those days of feast ended, he summoned that beloved one. He said to him: ‘I made a feast for all the residents of the province, but for you, alone I will make a feast. Why?
It is because you are my beloved.’ So, [with respect to] the King of kings, the Holy One blessed be He. You find that twelve tribes presented offerings for the dedication of the altar and the Holy One blessed be He accepted them, as it is stated: “Take from them” (Numbers 7:5). But the tribe of Levi did not present an offering.
When the dedication of the altar was completed, the Holy One blessed be He said to Aaron and his sons: ‘All the tribes performed the dedication, but your tribe did not perform.’ Therefore, “Speak to Aaron, and say to him: When you kindle,” and then: “Take the Levites” (Numbers 8:6).