Deuteronomy 22

6, 7. If a bird's nest chance to be before thee--This is a beautiful instance of the humanizing spirit of the Mosaic law, in checking a tendency to wanton destructiveness and encouraging a spirit of kind and compassionate tenderness to the tiniest creatures. But there was wisdom as well as humanity in the precept; for, as birds are well known to serve important uses in the economy of nature, the extirpation of a species, whether of edible or ravenous birds, must in any country be productive of serious evils. But Palestine, in particular, was situated in a climate which produced poisonous snakes and scorpions; and the deserts and mountains would have been overrun with them as well as immense swarms of flies, locusts, mice, and vermin of various kinds if the birds which fed upon them were extirpated [MICHAELIS]. Accordingly, the counsel given in this passage was wise as well as humane, to leave the hen undisturbed for the propagation of the species, while the taking of the brood occasionally was permitted as a check to too rapid an increase.

8. thou shalt make a battlement for thy roof, that thou bring not blood upon thine house, if any man fall from thence--The tops of houses in ancient Judea, as in the East still, were flat, being composed of branches or twigs laid across large beams, and covered with a cement of clay or strong plaster. They were surrounded by a parapet breast high. In summer the roof is a favorite resort for coolness, and accidents would frequently happen from persons incautiously approaching the edge and falling into the street or court; hence it was a wise and prudent precaution in the Jewish legislator to provide that a stone balustrade or timber railing round the roof should form an essential part of every new house.

9. Thou shalt not sow thy vineyard with divers

10. Thou shalt not plough with an ox and an ass together--Whether this association, like the mixture of seeds, had been dictated by superstitious motives and the prohibition was symbolical, designed to teach a moral lesson ( 2 Corinthians 6:14 ), may or may not have been the case. But the prohibition prevented a great inhumanity still occasionally practised by the poorer sort in Oriental countries. An ox and ass, being of different species and of very different characters, cannot associate comfortably, nor unite cheerfully in drawing a plough or a wagon. The ass being much smaller and his step shorter, there would be an unequal and irregular draft. Besides, the ass, from feeding on coarse and poisonous weeds, has a fetid breath, which its yoke fellow seeks to avoid, not only as poisonous and offensive, but producing leanness, or, if long continued, death; and hence, it has been observed always to hold away its head from the ass and to pull only with one shoulder.