He must then put the incense on the fire before the Lord, and the cloud of incense will cover the atonement plate which is above the ark of the testimony, ¹  so that he will not die. ² 

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 ¹  in front of the atonement plate ²  that is on the ark so that he may not die, for I will appear in the cloud over the atonement plate.