In Numbers 4 the census continues with all of the Levites between 30 and 50 years old. This chapter specifies what each Levitical clan must do in verses 3-33 and then records their number in verses 34-49. The ESV Study Bible records about the Kohathites: “The Kohathite priests handle the most holy items of the tabernacle (such as the ark, lampstand, and altars), but the non-priestly Kohathites are not even to look at them, lest they die. If someone looks at God, he will die (Ex. 33:20), and because these items share this intense divine holiness, they could prove equally lethal (Num. 4:17–20).”