There you will present them to me by placing the incense on the coals, so that the place of mercy will be covered with a cloud of smoke. Do this, or you will die there!
Whenever they enter the sacred tent or serve at the altar or enter the holy place, they must wear these shorts, or else they will be guilty and die. This same rule applies to any of their descendants who serve as priests.
Then Moses told Aaron, “Grab your fire pan and fill it with hot coals from the altar. Put incense in it, then quickly take it to where the people are and offer it to the LORD, so they can be forgiven. The LORD is very angry, and people have already started dying!”
When the camp is ready to be moved, the Kohathites will be responsible for carrying the sacred objects and the furnishings of the sacred tent. But Aaron and his sons must have already covered those things so the Kohathites won't touch them and die.
This is why Christ did not go into a tent that had been made by humans and was only a copy of the real one. Instead, he went into heaven and is now there with God to help us.