Here is, 1. A general rule concerning fishes, which were clean and which not. All that had fins and scales they might eat, and only those odd sorts of water-animals that have not were forbidden, Lev 11:9, Lev 11:10. The ancients accounted fish the most delicate food (so far were they from allowing it on fasting-days, or making it an instance of mortification to eat fish); therefore God did not lay much restraint upon his people in them; for he is a Master that allows his servants not only for necessity but for delight. Concerning the prohibited fish it is said, They shall be an abomination to you (Lev 11:10-12), that is, "You shall count them unclean, and not only not eat of them, but keep at a distance from them." Note, Whatever is unclean should be to us an abomination; touch not the unclean thing. But observe, It was to be an abomination only to Jews; the neighbouring nations were under none of these obligations, nor are these things to be an abomination to us Christians. The Jews were honoured with peculiar privileges, and therefore, lest they should be proud of those, Transeunt cum onere - They were likewise laid under peculiar restraints. Thus God's spiritual Israel, as they are dignified above others by the gospel-covenant of adoption and friendship, so they must be mortified more than others by the gospel-commands of self-denial and bearing the cross. 2. Concerning fowls here is no general rule given, but a particular enumeration of those fowls that they must abstain from as unclean, which implies an allowance of all others. The critics here have their hands full to find out what is the true signification of the Hebrew words here used, some of which still remain uncertain, some sorts of fowls being peculiar to some countries. Were the law in force now, we should be concerned to know with certainty what are prohibited by it; and perhaps if we did, and were better acquainted with the nature of the fowls here mentioned, we should admire the knowledge of Adam, in giving them names expressive of their natures, Gen 2:20. But the law being repealed, and the learning in a great measure lost, it is sufficient for us to observe that of the fowls here forbidden, (1.) Some are birds of prey, as the eagle, vulture, etc., and God would have his people to abhor every thing that is barbarous and cruel, and not to live by blood and rapine. Doves that are preyed upon were fit to be food for man and offerings to God; but kites and hawks that prey upon them must be looked upon as an abomination to God and man; for the condition of those that are persecuted for righteousness' sake appears to an eye of faith every way better than that of their persecutors. (2.) Others of them are solitary birds, that abide in dark and desolate places, as the owl and the pelican (Psa 102:6), and the cormorant and raven (Isa 34:11); for God's Israel should not be a melancholy people, nor affect sadness and constant solitude. (3.) Others of them feed upon that which is impure, as the stork on serpents, others of them on worms; and we must not only abstain from all impurity ourselves, but from communion with those that allow themselves in it. (4.) Others of them were used by the Egyptians and other Gentiles in their divinations. Some birds were reckoned fortunate, others ominous; and their soothsayers had great regard to the flights of these birds, all which therefore must be an abomination to God's people, who must not learn the way of the heathen.

Whatsoever hath fins and scales - Because these, of all the fish tribe, are the most nourishing; the others which are without scales, or whose bodies are covered with a thick glutinous matter, being in general very difficult of digestion.

They shall be even an abomination to you,.... This is repeated again and again, to deter from the eating of such fishes, lest there should be any desire after them:

ye shall not eat of their flesh, here mention is made of the flesh of fishes, as is by the apostle, Co1 15:39. Aben Ezra observes, that their wise men say, this is according to the usage of words in those ages:

but you shall have their carcasses in abomination; not only abstain from eating them and touching them, but to express the utmost aversion to them.

These shall ye eat . . . whatsoever hath fins and scales--"The fins and scales are the means by which the excrescences of fish are carried off, the same as in animals by perspiration. I have never known an instance of disease produced by eating such fish; but those that have no fins and scales cause, in hot climates, the most malignant disorders when eaten; in many cases they prove a mortal poison" [WHITLAW].