For but, read yea: Yea, your eyes have seen, etc.
An additional motive to fidelity and obedience is here adduced, drawn from the peculiar excellence and advantages of the land. Canaan was not like Egypt, a country that depended for its fertility on being irrigated by man's labor or by artificial processes, but was a land where the supply and distribution of water was provided for in natural reservoirs and channels, by means of which the rain which God, who cared for the land, sent plentifully on it, was made available for useful purposes. In Egypt there is little or no rain, and the people are dependent on the annual overflowing of the Nile for the proper irrigation of their fields; and as this lasts only for a short period, the water has to be stored and redistributed by artificial means, often of a very laborious kind. Wateredst it with thy foot. "The reference, perhaps, is to the manner of conducting the water about from plant to plant and from furrow to furrow. I have often watched the gardener at this fatiguing and unhealthy work. When one place is sufficiently saturated, he pushes aside the sandy soil between it and the next furrow with his foot, and thus continues to do until all are watered. He is thus knee-deep in mud, and many are the diseases generated by this slavish work. Or the reference may be to certain kinds of hydraulic machines which were turned by the feet. I have seen small water-wheels, on the plain of Acre and elsewhere, which were thus worked; and it appeared to me to be very tedious and toilsome, and, if the whole country had to be irrigated by such a process, it would require a nation of slaves like the Hebrews, and taskmasters like the Egyptians, to make it succeed. Whatever may have been the meaning of Moses, the Hebrews no doubt had learned by bitter experience what it was to water with the foot; and this would add great force to the allusion, and render doubly precious the goodly land which drank of the rain of heaven, and required no such drudgery to make it fruitful". Philo describes a machine cf. this sort as in use in Egypt; and in that country, "a garden of herbs" is still generally watered by means of a machine of simple construction, consisting of a wheel, round which revolves an endless rope to which buckets are attached; this is worked by the feet of a man seated on a piece of wood fastened by the side of the machine, labor at once monotonous and severe.