Leviticus 16:2 - Matthew Poole's English Annotations on the Holy Bible

That he come not at all times; not whensoever he pleaseth, but only when I shall appoint him, to wit, to take down the parts and furniture of it upon every removal, and to minister unto me once in the year, Exodus 30:10. Holyplace, i.e. into the most holy, or the holy of holies, as the following words demonstrate, which is sometimes called only the holy place, as Hebrews 9:2,3; the positive degree put for the comparative, which is not unusual in Scripture. Within the veil, to wit, the second veil. See Leviticus 4:6. That he die not, for his irreverence and presumption. I will appear, visibly and gloriously; that is, as it were, my presence-chamber whither the priest shall not dare to come but when I call him. In the cloud; either in that dark place, for there was no light came into it, and clouds and darkness go together, and one may be put for the other; or in a bright and glorious cloud, which used to be over the mercy-seat, or rather in the cloud of incense mentioned afterward, Leviticus 16:13.