12 Then Micah installed the Levite, and the young man became his priest and lived in his house.

Read Judges 17:12 Using Other Translations

And Micah consecrated the Levite; and the young man became his priest, and was in the house of Micah.
And Micah ordained the Levite, and the young man became his priest, and was in the house of Micah.
So Micah installed the Levite as his personal priest, and he lived in Micah’s house.