Numbers 4:20

Overview - Numbers 4
The age at which the Levites were to begin to serve, and the duration of the service.
The duty of the Kohathites.
16 The charge of Eleazar.
17 The office of the priests.
21 The duty of the Gershonites;
29 of the Merarites.
34 The number of the Kohathites;
38 of the Gershonites
42 and of the Merarites.
Treasury of Scripture Knowledge

Numbers 4:20  (King James Version)
But they shall not go in to see when the holy things are covered, lest they die.

they shall
Numbers 4:15 Numbers 4:19 ; Exodus 19:21 ; Leviticus 10:2 ; 1 Samuel 6:19 ; Hebrews 10:19 Hebrews 10:20 ; Revelation 11:19

the holy things
{Hakkodesh,} "the holy," or "sanctuary," ie., the ark, as
the Jews generally understand it; and with good reason, as any one may be convinced, who compares 1 ; Ki 8:8 ; with 2 ; Ch 5:9 where that which is called the holy in the former, is
called the ark in the latter.