1 Chronicles

Behold, bless ye the Lord, all ye servants of the Lord, which by night stand in the house of the Lord.

And these are they whom David set over the service of song in the house of the Lord, after that the ark had rest.

And these are they that waited with their children. Of the sons of the Kohathites: Heman a singer, the son of Joel, the son of Shemuel,

Moreover David and the captains of the host separated to the service of the sons of Asaph, and of Heman, and of Jeduthun, who should prophesy with harps, with psalteries, and with cymbals: and the number of the workmen according to their service was:

The four and twentieth to Romamti–ezer, he, his sons, and his brethren, were twelve.