'Day's' in the Bible

And a spirit hath journeyed from Jehovah, and cutteth off quails from the sea, and leaveth by the camp, as a day's journey here, and as a day's journey there, round about the camp, and about two cubits, on the face of the land.

and he himself hath gone into the wilderness a day's Journey, and cometh and sitteth under a certain retem-tree, and desireth his soul to die, and saith, 'Enough, now, O Jehovah, take my soul, for I am not better than my fathers.'

and, having supposed him to be in the company, they went a day's journey, and were seeking him among the kindred and among the acquaintances,