'Unfairly' in the Bible

If she's displeasing to her master who selected her for himself, he must let her be redeemed. He does not have the right to sell her to foreign people, because he has dealt unfairly with her.

“You must not be unfair in measurements of length, weight, or volume.

For everyone who does such things and acts unfairly is detestable to the Lord your God.

"'Sure to be judged is the king who builds his palace using injustice and treats people unfairly while adding its upper rooms. He makes his countrymen work for him for nothing. He does not pay them for their labor.