Leviticus 16:2

That he come not at all times Not whensoever he pleaseth, but only when I shall appoint. Into the holy place without the veil, the high- priest, or one of the inferior priests, went every morning and evening when they offered incense but into this holy place within the veil, commonly called the holy of holies, or the most holy place, as none but the high-priest was to enter, so neither was he to enter it at all times, as a common place of worship, or to perform divine service there at his pleasure. He was ordinarily to enter it only once a year, and that on the great day of atonement, or expiation for the transgressions of the whole Israelitish nation. Upon extraordinary occasions, he might also enter it oftener, as when he was to consult the oracle of God, or when the tabernacle was to be taken down or set up, according to the journeyings of the people. Lest he die For his presumption. For I will appear in the cloud A bright and glorious cloud over the mercy-seat. This sacred apartment he was to look upon as the place of the special residence of the divine glory, and therefore was not to enter there but when appointed, and in such a manner as God directed.