NumΑριθ NumbersΑριθμοί, chapterκεφάλαιο Book of NumbersΑριθμοί, chapterκεφάλαιο 3

They are to carry out duties on his behalf and for all the Israelites at the Tent of Meeting, looking after the service of the Tabernacle. They are responsible for caring for all the furniture of the Tent of Meeting, serving the Israelites through what they do in the Tabernacle. Lev 8:35The Levites are to work exclusively for Aaron and his sons because this is their assignment among the Israelites. Num 8:19