2 Chronicles 29:24-26

Young's Literal Translation

²⁴ and the priests slaughter them, and make a sin-offering with their blood on the altar, to make atonement for all Israel, for `For all Israel,' said the king, `[is] the burnt-offering and the sin-offering.'

²⁵ And he appointeth the Levites in the house of Jehovah with cymbals, with psalteries, and with harps, by the command of David, and of Gad, seer of the king, and of Nathan the prophet, for by the hand of Jehovah [is] the command, by the hand of His prophets;

²⁶ and the Levites stand with the instruments of David, and the priests with the trumpets.