It shall be on Aaron when he ministers. And its sound shall be heard when he goes into the holy place before the Lord, and when he comes out, so that he does not die.
The Lord said to Moses: Speak to Aaron your brother so that he does not come at any time into the Holy Place within the veil before the mercy seat, which is on the ark, so that he will not die, for I will appear in the cloud on the mercy seat.