Numbers 7:9-11

Young's Literal Translation

⁹ and to the sons of Kohath he hath not given, for the service of the sanctuary [is] on them: on the shoulder they bear.

¹⁰ And the princes bring near the dedication of the altar in the day of its being anointed; yea, the princes bring near their offering before the altar.

¹¹ And Jehovah saith unto Moses, `One prince a day -- one prince a day -- do they bring near their offering for the dedication of the altar.'