All of these people were Obed Edom’s descendants. They, their sons, and their relatives were skilled and had the ability to perform the service. Obed Edom’s family included 62 men.
Shallum (son of Kore, grandson of Ebiasaph, great-grandson of Korah) and the members of his family (Korah’s descendants) were responsible for serving as watchmen at the entrances to the tent, as their ancestors had been in charge of guarding the entrances to the Lord’s camp.