Ezra 8:20

20 They also brought 220 of the temple servants—a body that David and the officials had established to assist the Levites. All were registered by name.

Read Ezra 8:20 Using Other Translations

Also of the Nethinims, whom David and the princes had appointed for the service of the Levites, two hundred and twenty Nethinims: all of them were expressed by name.
besides 220 of the temple servants, whom David and his officials had set apart to attend the Levites. These were all mentioned by name.
and 220 Temple servants. The Temple servants were assistants to the Levites—a group of Temple workers first instituted by King David and his officials. They were all listed by name.