Job 31:13

If I have dismissed the case of my male or female servants
when they made a complaint against me,

Exodus 21:20-21

“When a man strikes his male or female slave with a rod, and the slave dies under his abuse, the owner must be punished.

Exodus 21:26-27

“When a man strikes the eye of his male or female slave and destroys it, he must let the slave go free in compensation for his eye.

Leviticus 25:43

You are not to rule over them harshly but fear your God.

Leviticus 25:46

You may leave them to your sons after you to inherit as property; you can make them slaves for life. But concerning your brothers, the Israelites, you must not rule over one another harshly.

Deuteronomy 15:12-15

“If your fellow Hebrew, a man or woman, is sold to you and serves you six years, you must set him free in the seventh year.

Deuteronomy 24:14-15

“Do not oppress a hired hand who is poor and needy, whether one of your brothers or one of the foreigners residing within a town in your land.

Jeremiah 34:14-17

At the end of seven years, each of you must free his Hebrew brother who sold himself to you. He may serve you six years, but then you must send him out free from you. But your ancestors did not obey Me or pay any attention.

Ephesians 6:9

And masters, treat your slaves the same way, without threatening them, because you know that both their Master and yours is in heaven, and there is no favoritism with Him.

Colossians 4:1

Masters, supply your slaves with what is right and fair, since you know that you too have a Master in heaven.

Treasury of Scripture Knowledge

Summary

If I did despise the cause of my manservant or of my maidservant, when they contended with me;

Bible References

The cause

Exodus 21:20
“When a man strikes his male or female slave with a rod, and the slave dies under his abuse, the owner must be punished.
Leviticus 25:43
You are not to rule over them harshly but fear your God.
Deuteronomy 15:12
“If your fellow Hebrew, a man or woman, is sold to you and serves you six years, you must set him free in the seventh year.
Jeremiah 34:14
At the end of seven years, each of you must free his Hebrew brother who sold himself to you. He may serve you six years, but then you must send him out free from you. But your ancestors did not obey Me or pay any attention.
Ephesians 6:9
And masters, treat your slaves the same way, without threatening them, because you know that both their Master and yours is in heaven, and there is no favoritism with Him.
Colossians 4:1
Masters, supply your slaves with what is right and fair, since you know that you too have a Master in heaven.

General references

Exodus 21:26
“When a man strikes the eye of his male or female slave and destroys it, he must let the slave go free in compensation for his eye.
Exodus 23:6
“You must not deny justice to a poor person among you in his lawsuit.
Deuteronomy 24:14
“Do not oppress a hired hand who is poor and needy, whether one of your brothers or one of the foreigners residing within a town in your land.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.