Verse 33. Three days - With continued journeys; only it seems probable, that the cloud made little pauses that they might have time for sleep and necessary refreshments. The ark went before them - Altho' in their stations it was in the middle, yet in their marches it went before them; and the cloud was constantly over the ark whether it stood or went; therefore the ark is said to go before and direct them, not as if the ark could be seen of all the camps, which being carried only upon mens shoulders was impossible; but because the cloud, which always attended upon the ark, and did, together with the ark, constitute, in a manner, one sign of God's presence, did lead and direct them. To search out - A metaphorical expression, for discovering to them; for the ark could not search, and God, who knew all places and things, needed not to search.
Verse 34. By day - And by night too, as was expressed before. So we must learn to compare places of scripture, and to supply the defects of one out of another, as we do in all authors.
Verse 36. Return - Or, give rest, that is, a safe and quiet place, free from enemies and dangers.