But Aaron and his sons offered on the altar of burnt offering, and on the altar of incense, for all the work of the most holy place, and to make atonement for Israel, according to all that Moses the servant of God had commanded.
And these are they whom David set over the service of song in the house of the LORD, after the ark had rest. And they ministered before the dwelling place of the tabernacle of the congregation with singing, until Solomon had built the house of the LORD in Jerusalem: and then they waited on their office according to their order. And these are they that waited with the children. Of the sons of the Kohathites: and Heman the singer ( 1 Chronicles 6:31-33 ).