Nevertheless a fountain or pit, wherein there is plenty of water, shall be clean: but that which toucheth their carcase shall be unclean.
Nevertheless a fountain or pit, wherein there is plenty of water, shall be clean. The reason of this exception is obvious-namely, that the influx of fresh water would remove the impurity caused by the carcass; and this was a considerate as well as benevolent regulation; because in a region where water is scarce, it would have been a grievous hardship to interdict the whole water in the spring or tank as unclean.