The law here appears harmoniously to supplement the earlier one in Exodus 21:1-6. It was another check applied periodically to the tyranny of the rich. Compare Jeremiah 34:8-17.

And if thy brother that dwelleth by thee be waxen poor,.... The above laws and instructions seem designed to prevent such extreme poverty as obliged to what follows, namely, a brother being sold either to an Israelite or to a stranger, by relieving his wants or lending him money; but when these were insufficient to support him, and keep him from sinking into the lowest state of distress and misery, then he was obliged to be sold, as follows:

and be sold unto thee; either by himself, being ready to starve and perish, or by the sanhedrim, having stolen something, as Aben Ezra observes; in such a case the civil magistrate had a power of selling a man, Exodus 22:3,

thou shall not compel him to serve as a bondservant; such as were Heathens, and bought of them, or taken in war and made slaves of; but an Israelite sold was not to serve as they, either with respect to matter or manner, or time of service; such as were bondmen were put to the hardest service, the greatest drudgery, as well as what was mean and reproachful, and were used in the most rigorous and despotic manner, and were obliged to serve for ever, and were never released; but a brother, an Israelite, sold to another through extreme poverty, was not to be put to any low, mean, base, and disgraceful service, by which it would be known that he was a servant, as Jarchi notes; such as to carry his master's vessels or instruments after him to the bath, or to unloose his shoes; but, as the same writer observes, he was to be employed in the business of the farm, or in some handicraft work, and was to be kindly and gently used, rather as a brother than a servant, and to be freed in the year of jubilee.

And if thy brother that dwelleth by thee be waxen poor, and be sold unto thee; thou shalt not compel him to serve as a bondservant:

25:39 As a bond - man - Neither for the time, for ever, nor for the manner, with the hardest and vilest kinds of service, rigorously and severely exacted.

compel...: Heb. serve thyself with him with the service, etc

39-46. if thy brother . be waxen poor, and be sold unto thee, thou shalt not compel him to serve as a bond-servant-An Israelite might be compelled, through misfortune, not only to mortgage his inheritance, but himself. In the event of his being reduced to this distress, he was to be treated not as a slave, but a hired servant whose engagement was temporary, and who might, through the friendly aid of a relative, be redeemed at any time before the Jubilee. The ransom money was determined on a most equitable principle. Taking account of the number of years from the proposal to redeem and the Jubilee, of the current wages of labor for that time, and multiplying the remaining years by that sum, the amount was to be paid to the master for his redemption. But if no such friendly interposition was made for a Hebrew slave, he continued in servitude till the year of Jubilee, when, as a matter of course, he regained his liberty, as well as his inheritance. Viewed in the various aspects in which it is presented in this chapter, the Jubilee was an admirable institution, and subservient in an eminent degree to uphold the interests of religion, social order, and freedom among the Israelites.

25:39-55 A native Israelite, if sold for debt, or for a crime, was to serve but six years, and to go out the seventh. If he sold himself, through poverty, both his work and his usage must be such as were fitting for a son of Abraham. Masters are required to give to their servants that which is just and equal, Col 4:1. At the year of jubilee the servant should go out free, he and his children, and should return to his own family. This typified redemption from the service of sin and Satan, by the grace of God in Christ, whose truth makes us free, Joh 8:32. We cannot ransom our fellow-sinners, but we may point out Christ to them; while by his grace our lives may adorn his gospel, express our love, show our gratitude, and glorify his holy name.