Exodus 28:35

Aaron is to put it on for his holy work; and the sound of it will be clear, when he goes into the holy place before the Lord, and when he comes out, keeping him safe from death.

Leviticus 16:2

The Lord said to Moses, Say to Aaron, your brother, that he may not come at all times into the holy place inside the veil, before the cover which is on the ark, for fear that death may overtake him; for I will be seen in the cloud on the cover of the ark.

Hebrews 9:12

And has gone once and for ever into the holy place, having got eternal salvation, not through the blood of goats and young oxen, but through his blood.

Treasury of Scripture Knowledge

Summary

And it shall be upon Aaron to minister: and his sound shall be heard when he goeth in unto the holy place before the LORD, and when he cometh out, that he die not.

General references

Bible References

Goeth in

Leviticus 16:2
The Lord said to Moses, Say to Aaron, your brother, that he may not come at all times into the holy place inside the veil, before the cover which is on the ark, for fear that death may overtake him; for I will be seen in the cloud on the cover of the ark.
Hebrews 9:12
And has gone once and for ever into the holy place, having got eternal salvation, not through the blood of goats and young oxen, but through his blood.

General references

Exodus 39:22
The robe which went with the ephod was made all of blue;

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain