Moses
Leviticus 25:39BSB·traditional attribution

If a countryman among you becomes destitute and sells himself to you, then you must not force him into slave labor.

John Calvin Reformed @genevareformer

39. And if thy brother. He now proceeds further, i e., that one who has bought his brother should treat him with humanity, and not otherwise than a hired servant. We have seen, indeed, just above, that the labor of a slave is estimated at twice as much, because the humanity of his master will never go so far as to indulge or spare his...

Matthew Henry Presbyterian @wholebiblehenry

We have here the laws concerning servitude, designed to preserve the honour of the Jewish nation as a free people, and rescued by a divine power out of the house of bondage, into the glorious liberty of God's sons, his first-born. Now the law is, I. That a native Israelite should never be made a bondman for perpetuity.

Commenting on Leviticus 25:39-55

John Gill Reformed Baptist @doctorgill

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...