(37) And if any part of their carcase.--The principle which underlies the immunity from pollution of living water is also at the basis of the exception of living plants. Hence if the carcase or a portion of a dead reptile is found among grain destined for sowing, the quantity of wheat in which it is discovered does not become defiled, since the growing plant constantly derives new elements from below and fresh moisture from above, thus undergoing as many changes in its way as spring water. The law therefore which obtained during the second Temple was as follows :--"Whatever is fixed in the ground does not contract defilement. Plants are not defiled till they are gathered." Hence the ancient Chaldee version of Jonathan renders this verse: "If any part of their carcase falleth upon any seed that is sown in the manner in which it is commonly sown--that is, in its dry state--it is clean."

11:1-47 What animals were clean and unclean. - These laws seem to have been intended, 1. As a test of the people's obedience, as Adam was forbidden to eat of the tree of knowledge; and to teach them self-denial, and the government of their appetites. 2. To keep the Israelites distinct from other nations. Many also of these forbidden animals were objects of superstition and idolatry to the heathen. 3. The people were taught to make distinctions between the holy and unholy in their companions and intimate connexions. 4. The law forbad, not only the eating of the unclean beasts, but the touching of them. Those who would be kept from any sin, must be careful to avoid all temptations to it, or coming near it. The exceptions are very minute, and all were designed to call forth constant care and exactness in their obedience; and to teach us to obey. Whilst we enjoy our Christian liberty, and are free from such burdensome observances, we must be careful not to abuse our liberty. For the Lord hath redeemed and called his people, that they may be holy, even as he is holy. We must come out, and be separate from the world; we must leave the company of the ungodly, and all needless connexions with those who are dead in sin; we must be zealous of good works devoted followers of God, and companions of his people.
]And if any part of their carcass fall upon any sowing seed that is to be sown,.... That which is selected from the other seed in order to be sown, and which is laid by and laid up for that purpose; should the carcass, or any part of the carcass of a creeping thing fall upon an heap of it, into a vessel in which it was put, as a dead mouse or the like:

yet it shall be clean; be fit for use and sown in the earth; because being cast into the earth, and dying and quickening there, and then springing up again in stalk and ear, it would go through various changes before it became the food of man: the Targum of Jonathan describes it, such as is sown in its dryness, or being dry; for if it was wetted it was unfit for use, as follows.