Some uncleanness - Any cause of dislike, for this great latitude of meaning the fact itself authorizes us to adopt, for it is certain that a Jew might put away his wife for any cause that seemed good to himself; and so hard were their hearts, that Moses suffered this; and we find they continued this practice even to the time of our Lord, who strongly reprehended them on the account, and showed that such license was wholly inconsistent with the original design of marriage; see Matthew 5:31; (note), etc.; Matthew 19:3; (note), etc., and the notes there.
In this and the next chapter certain particular rights and duties, domestic, social, and civil, are treated. The cases brought forward have often no definite connection, and seem selected in order to illustrate the application of the great principles of the Law in certain important events and circumstances.
These four verses contain only one sentence, and should be rendered thus: If a man hath taken a wife, etc., and given her a bill of divorcement and Deuteronomy 24:2 if she has departed out of his house and become another man‘s wife; and Deuteronomy 24:3 if the latter husband hates her, then Deuteronomy 24:4 her former husband, etc.
Moses neither institutes nor enjoins divorce. The exact spirit of the passage is given in our Lord‘s words to the Jews‘, “Moses because of the hardness of your hearts suffered you to put away your wives” Matthew 19:8. Not only does the original institution of marriage as recorded by Moses Genesis 2:24 set forth the perpetuity of the bond, but the verses before us plainly intimate that divorce, while tolerated for the time, contravenes the order of nature and of God. The divorced woman who marries again is “defiled” Deuteronomy 24:4, and is grouped in this particular with the adulteress (compare Leviticus 18:20). Our Lord then was speaking according to the spirit of the law of Moses when he declared, “Whoso marrieth her which is put away doth commit adultery” Matthew 19:9. He was speaking too not less according to the mind of the prophets (compare Malachi 2:14-16). But Moses could not absolutely put an end to a practice which was traditional, and common to the Jews with other Oriental nations. His aim is therefore to regulate and thus to mitigate an evil which he could not extirpate.