Charles Ellicott Commentary Leviticus 25:14

"And if thou sell aught unto thy neighbor, or buy of thy neighbor`s hand, ye shall not wrong one another." — Leviticus 25:14 (ASV)

Ye shall not oppress one another. —Better, you shall not overreach any man his brother. Not only does the Law provide against the poor man losing his land forever, but it also enjoins that in temporary sales, the buyer and seller are not to take undue advantage of each other’s circumstances. Hence, it was enacted that if anyone bought or sold anything for a sixth part more than its value, the aggrieved party was entitled to have the excess returned to him; and if it amounted to more than a sixth part, the contract could be rescinded altogether.

The fact that the phrase translated here as “one another” in the Authorized Version is varied in the Hebrew in Leviticus 25:17 (where it is also rendered “one another”) shows that it is not used in this idiomatic sense. Instead, it is designed to denote fellow brethren, members of the same community—those who are related to each other by race and creed, as in Exodus 32:27 and Jeremiah 31:34.