Numbers 3:28-29

3:28 Counting every male from a month old and upward, there were 8,600. They were responsible for the care of the sanctuary. 3:29 The families of the Kohathites were to camp on the south side of the tabernacle.

Numbers 1:53

1:53 But the Levites must camp around the tabernacle of the testimony, so that the Lord’s anger will not fall on the Israelite community. The Levites are responsible for the care of the tabernacle of the testimony.”