'Cloud' in the Bible

The Lord said to Moses, Say to Aaron, your brother, that he may not come at all times into the holy place inside the veil, before the cover which is on the ark, for fear that death may overtake him; for I will be seen in the cloud on the cover of the ark.

And let him put the perfume on the fire before the Lord so that the ark may be covered with a cloud of the smoke of the perfume, in order that death may not overtake him.