Leviticus 25:44-46
Your menservants and maidservants shall come from the nations around you, from whom you may purchase them. / You may also purchase them from the foreigners residing among you or their clans living among you who are born in your land. These may become your property. / You may leave them to your sons after you to inherit as property; you can make them slaves for life. But as for your brothers, the Israelites, no man may rule harshly over his brother.

Deuteronomy 15:12-18
If a fellow Hebrew, a man or a woman, is sold to you and serves you six years, then in the seventh year you must set him free. / And when you release him, do not send him away empty-handed. / You are to furnish him liberally from your flock, your threshing floor, and your winepress. You shall give to him as the LORD your God has blessed you. ...

Deuteronomy 24:14-15
Do not oppress a hired hand who is poor and needy, whether he is a brother or a foreigner residing in one of your towns. / You are to pay his wages each day before sunset, because he is poor and depends on them. Otherwise he may cry out to the LORD against you, and you will be guilty of sin.

Job 31:13-15
If I have rejected the cause of my manservant or maidservant when they made a complaint against me, / what will I do when God rises to judge? How will I answer when called to account? / Did not He who made me in the womb also make them? Did not the same One form us in the womb?

Proverbs 12:10
A righteous man regards the life of his animal, but the tender mercies of the wicked are only cruelty.

Proverbs 29:21
A servant pampered from his youth will bring grief in the end.

Isaiah 58:3-7
“Why have we fasted, and You have not seen? Why have we humbled ourselves, and You have not noticed?” “Behold, on the day of your fast, you do as you please, and you oppress all your workers. / You fast with contention and strife to strike viciously with your fist. You cannot fast as you do today and have your voice be heard on high. / Is this the fast I have chosen: a day for a man to deny himself, to bow his head like a reed, and to spread out sackcloth and ashes? Will you call this a fast and a day acceptable to the LORD? ...

Jeremiah 34:8-17
After King Zedekiah had made a covenant with all the people in Jerusalem to proclaim liberty, the word came to Jeremiah from the LORD / that each man should free his Hebrew slaves, both male and female, and no one should hold his fellow Jew in bondage. / So all the officials and all the people who entered into this covenant agreed that they would free their menservants and maidservants and no longer hold them in bondage. They obeyed and released them, ...

Malachi 3:5
“Then I will draw near to you for judgment. And I will be a swift witness against sorcerers and adulterers and perjurers, against oppressors of the widowed and fatherless, and against those who defraud laborers of their wages and deny justice to the foreigner but do not fear Me,” says the LORD of Hosts.

Matthew 18:23-35
Because of this, the kingdom of heaven is like a king who wanted to settle accounts with his servants. / As he began the settlements, a debtor owing ten thousand talents was brought to him. / Since the man was unable to pay, the master ordered that he be sold to pay his debt, along with his wife and children and everything he owned. ...

Matthew 24:45-51
Who then is the faithful and wise servant, whom the master has put in charge of his household, to give the others their food at the proper time? / Blessed is that servant whose master finds him doing so when he returns. / Truly I tell you, he will put him in charge of all his possessions. ...

Luke 12:42-48
And the Lord answered, “Who then is the faithful and wise manager, whom the master puts in charge of his servants to give them their portion at the proper time? / Blessed is that servant whose master finds him doing so when he returns. / Truly I tell you, he will put him in charge of all his possessions. ...

Luke 17:7-10
Which of you whose servant comes in from plowing or shepherding in the field will say to him, ‘Come at once and sit down to eat’? / Instead, won’t he tell him, ‘Prepare my meal and dress yourself to serve me while I eat and drink, and afterward you may eat and drink’? / Does he thank the servant because he did what he was told? ...

John 13:16
Truly, truly, I tell you, no servant is greater than his master, nor is a messenger greater than the one who sent him.

Romans 6:16-18
Do you not know that when you offer yourselves as obedient slaves, you are slaves to the one you obey, whether you are slaves to sin leading to death, or to obedience leading to righteousness? / But thanks be to God that, though you once were slaves to sin, you wholeheartedly obeyed the form of teaching to which you were committed. / You have been set free from sin and have become slaves to righteousness.