'Cloud' in the Bible

Moses and Aaron went into the Tent of Meeting, and when they came out they blessed the people, and the glory and brilliance of the Lord [the Shekinah cloud] appeared to all the people [as promised].

And the LORD said unto Moses, Speak unto Aaron thy brother, that he come not at all times into the holy place within the vail before the mercy seat, which is upon the ark; that he die not: for I will appear in the cloud upon the mercy seat.

And he shall put the incense upon the fire before the LORD, that the cloud of the incense may cover the mercy seat that is upon the testimony, that he die not: