Ye shall keep my statutes. Thou shalt not let thy cattle gender with a {g} diverse kind: thou shalt not sow thy field with mingled seed: neither shall a garment mingled of linen and woollen come upon thee.

(g) As a horse to leap an ass, or a mule a mare.

Wesley's Notes

19:19 Thou shalt not let thy cattle gender - This was prohibited, partly to restrain the curiosity and boldness of men, who might attempt to amend or change the works of God, partly that by the restraint here laid even upon brute - creatures men might be taught to abhor all unnatural lusts, partly to teach the Israelites to avoid mixtures with other nations, either in marriage or in religion, which also may be signified by the following prohibitions.

Jamieson-Fausset-Brown Bible Commentary

19. Thou shalt not let thy cattle gender with a diverse kind-This prohibition was probably intended to discourage a practice which seemed to infringe upon the economy which God has established in the animal kingdom.

thou shalt not sow thy field with mingled seed-This also was directed against an idolatrous practice, namely, that of the ancient Zabians, or fire-worshippers, who sowed different seeds, accompanying the act with magical rites and invocations; and commentators have generally thought the design of this and the preceding law was to put an end to the unnatural lusts and foolish superstitions which were prevalent among the heathen. But the reason of the prohibition was probably deeper: for those who have studied the diseases of land and vegetables tell us, that the practice of mingling seeds is injurious both to flowers and to grains. "If the various genera of the natural order Gramineæ, which includes the grains and the grasses, should be sown in the same field, and flower at the same time, so that the pollen of the two flowers mix, a spurious seed will be the consequence, called by the farmers chess. It is always inferior and unlike either of the two grains that produced it, in size, flavor, and nutritious principles. Independently of contributing to disease the soil, they never fail to produce the same in animals and men that feed on them" [Whitlaw].

neither shall a garment mingled of linen and woollen come upon thee-Although this precept, like the other two with which it is associated, was in all probability designed to root out some superstition, it seems to have had a further meaning. The law, it is to be observed, did not prohibit the Israelites wearing many different kinds of cloths together, but only the two specified; and the observations and researches of modern science have proved that "wool, when combined with linen, increases its power of passing off the electricity from the body. In hot climates, it brings on malignant fevers and exhausts the strength; and when passing off from the body, it meets with the heated air, inflames and excoriates like a blister" [Whitlaw]. (See Eze 44:17, 18).

Matthew Henry's Concise Commentary

19:1-37 laws. - There are some ceremonial precepts in this chapter, but most of these precepts are binding on us, for they are explanations of the ten commandments. It is required that Israel be a holy people, because the God of Israel is a holy God, ver. 2. To teach real separation from the world and the flesh, and entire devotedness to God. This is now the law of Christ; may the Lord bring every thought within us into obedience to it! Children are to be obedient to their parents, ver. 3. The fear here required includes inward reverence and esteem, outward respect and obedience, care to please them and to make them easy. God only is to be worshipped, ver. 4. Turn not from the true God to false ones, from the God who will make you holy and happy, to those that will deceive you, and make you for ever miserable. Turn not your eyes to them, much less your heart. They should leave the gleanings of their harvest and vintage for the poor, ver. 9. Works of piety must be always attended with works of charity, according to our ability. We must not be covetous, griping, and greedy of every thing we can lay claim to, nor insist upon our right in all things. We are to be honest and true in all our dealings, ver. 11. Whatever we have in the world, we must see that we get it honestly, for we cannot be truly rich, or long rich, with that which is not so. Reverence to the sacred name of God must be shown, ver. 12. We must not detain what belongs to another, particularly the wages of the hireling, ver. 13. We must be tender of the credit and safety of those that cannot help themselves, ver. 14. Do no hurt to any, because they are unwilling or unable to avenge themselves. We ought to take heed of doing any thing which may occasion our weak brother to fall. The fear of God should keep us from doing wrong things, though they will not expose us to men's anger. Judges, and all in authority, are commanded to give judgment without partiality, ver. 15. To be a tale-bearer, and to sow discord among neighbours, is as bad an office as a man can put himself into. We are to rebuke our neighbour in love, ver. 17. Rather rebuke him than hate him, for an injury done to thyself. We incur guilt by not reproving; it is hating our brother. We should say, I will do him the kindness to tell him of his faults. We are to put off all malice, and to put on brotherly love, ver. 18. We often wrong ourselves, but we soon forgive ourselves those wrongs, and they do not at all lessen our love to ourselves; in like manner we should love our neighbour. We must in many cases deny ourselves for the good of our neighbour. Ver. 31: For Christians to have their fortunes told, to use spells and charms, or the like, is a sad affront to God. They must be grossly ignorant who ask, What harm is there in these things? Here is a charge to young people to show respect to the aged, ver. 32. Religion teaches good manners, and obliges us to honour those to whom honour is due. A charge was given to the Israelites to be very tender of strangers, ver. 33. Strangers, and the widows and fatherless, are God's particular care. It is at our peril, if we do them any wrong. Strangers shall be welcome to God's grace; we should do what we can to recommend religion to them. Justice in weights and measures is commanded, ver. 35. We must make conscience of obeying God's precepts. We are not to pick and choose our duty, but must aim at standing complete in all the will of God. And the nearer our lives and tempers are to the precepts of God's law, the happier shall we be, and the happier shall we make all around us, and the better shall we adorn the gospel.