Leviticus 25:53

And as a yearly hired servant shall he be with him: and the other shall not rule with rigour over him in thy sight.

Cross-reference

Leviticus 25:43 commands not to rule harshly, which this verse reiterates in the context of a redeemed servant.

Leviticus 25:50 introduces the hired servant comparison, which this verse applies to forbid harsh treatment, completing the instruction.

Exodus 1:14 Contrast

Exodus 1:14 depicts the harsh slavery in Egypt, contrasting with the command here not to rule a servant harshly.