Matthew Poole and continuators on Numbers 9:15

15 And on the day that the tabernacle was reared up, the cloud covered the tabernacle, namely, the tent of the testimony : and at even there was upon the tabernacle, as it were the appearance of fire , until the morning.

Of which see Exod. 13. 12.

Or, The Tabernacle towards or above the tent of the Testimony, i. e. that part of the Tabernacle in which was the Testimony, or the ark of the Testimony; for there the cloudy pillar stood, Levit. 16. 2. This was an evident token of Gods special presence with and providence over them. See Exod. 14. 20, 24. Psal. 105. 39. And this cloud was easily distinguished from other clouds both by its peculiar figure and by its constant residence in that place.

That they might better discern it and direct themselves and their journeys or stations by it.

Marginal references: Exod. 40. 34.; Exod. 13. 21. and 40. 38.