'Three Days' in the Bible

Sometimes the cloud was resting on the House for two or three days; then, by the order of the Lord, they kept their tents in that place, and when the Lord gave the order they went on.

So they went forward three days' journey from the mountain of the Lord; and the ark of the Lord's agreement went three days' journey before them, looking for a resting-place for them;

And journeying on from before Hahiroth, they went through the sea into the waste land: they went three days' journey through the waste land of Etham and put up their tents in Marah.