He built a wall 30 feet in from the rear of the temple as a partition for an inner sanctuary that would be the most holy place. He paneled the wall with cedar planks from the floor to the rafters.
and the Lord said to Moses: “Tell Aaron your brother that he must not enter at any time into the holy place inside the veil-canopy in front of the atonement plate that is on the ark so that he may not die, for I will appear in the cloud over the atonement plate.