Numbers 4:20
But they shall not go in to see when the holy things are covered, lest they die.
Cross-reference
Numbers 4:15 describes that Kohathites carry only after Aaron covers the holy things — explaining the prohibition in 4:20 against looking.
Numbers 4:19 provides the positive instruction to assign tasks so Kohathites live — paired with the negative prohibition in 4:20 against looking.
Numbers 4:18 warns not to cut off the Kohathites, directly tied to the deadly prohibition of looking at holy things.
Numbers 18:3 repeats the prohibition of approaching sanctuary vessels to avoid death, reinforcing the same principle.
In Exodus 19:21, the same warning applies: not to gaze at God's presence on Sinai lest they perish.
1 Samuel 6:19 records the death of men who looked into the ark, directly illustrating the warning here.
Hebrews 10:19 contrasts the OT restriction by declaring boldness to enter the holy place through Jesus' blood.
Hebrews 10:20 describes the new living way through Christ, contrasting the old prohibition of looking at holy things.
In 2 Samuel 6:6, Uzzah's death for touching the ark illustrates the same deadly holiness warned about here — unauthorized access to sacred objects brings judgment.
In 1 Chronicles 15:2, David applies the rule that only Levites carry the ark — directly echoing the assignment of the Kohathites here.
Revelation 11:19 shows the ark of the covenant visible in heaven, contrasting the hiddenness and prohibition in Numbers.
1 Kings 8:8 describes the ark's poles visible only from the holy place, reflecting the careful handling of holy things.
2 Chronicles 5:9 repeats that the ark's poles were seen only inside, echoing the restriction on viewing holy items.
In Ezra 8:28, Ezra sanctifies priests for carrying holy treasures — reflecting the same principle of consecration for handling sacred objects as here.