1 Chronicles 25:8-12

And they cast lots, ward against ward, as well the small as the great, the teacher as the scholar.

Now the first lot came forth for Asaph to Joseph: the second to Gedaliah, who with his brethren and sons were twelve:

The third to Zaccur, he, his sons, and his brethren, were twelve:

The fourth to Izri, he, his sons, and his brethren, were twelve:

The fifth to Nethaniah, he, his sons, and his brethren, were twelve: