The topic of instructions for slaves and masters is addressed in several passages within the New Testament, reflecting the social and cultural context of the early Christian church. These instructions are found primarily in the Pauline Epistles and the General Epistles, providing guidance on the conduct and relationships between slaves and their masters within the Christian community.

Ephesians 6:5-9
In Ephesians, the Apostle Paul addresses both slaves and masters, urging them to conduct themselves in a manner worthy of their Christian calling. He writes:
"Slaves, obey your earthly masters with respect and fear and sincerity of heart, just as you would obey Christ. Obey them not only to win their favor when their eye is on you, but as slaves of Christ, doing the will of God from your heart. Serve with good will, as to the Lord and not to men, because you know that the Lord will reward each one for whatever good he does, whether he is slave or free." (Ephesians 6:5-8)

Paul continues with instructions for masters:
"And masters, do the same for them. Give up your use of threats, because you know that He who is both their Master and yours is in heaven, and there is no favoritism with Him." (Ephesians 6:9)

Colossians 3:22-4:1
Similarly, in Colossians, Paul reiterates the call for slaves to obey their masters and for masters to treat their slaves justly:
"Slaves, obey your earthly masters in everything, not only to please them while they are watching, but with sincerity of heart and fear of the Lord. Whatever you do, work at it with your whole being, for the Lord and not for men, because you know that you will receive an inheritance from the Lord as your reward. It is the Lord Christ you are serving." (Colossians 3:22-24)

Paul then addresses masters:
"Masters, provide your slaves with what is right and fair, since you know that you also have a Master in heaven." (Colossians 4:1)

1 Timothy 6:1-2
In his first letter to Timothy, Paul emphasizes the importance of slaves honoring their masters to uphold the reputation of God's name and Christian teaching:
"All who are under the yoke of slavery should regard their masters as fully worthy of respect, so that God’s name and our teaching will not be discredited. Those who have believing masters should not show them disrespect because they are brothers. Instead, they should serve them even better, since those who benefit from their service are believers and beloved." (1 Timothy 6:1-2)

Titus 2:9-10
Paul's letter to Titus includes instructions for slaves to be submissive and trustworthy:
"Slaves are to submit to their own masters in everything, to be well-pleasing, not argumentative, and not to steal from them, but to show that they can be fully trusted, so that in every way they will make the teaching about God our Savior attractive." (Titus 2:9-10)

1 Peter 2:18-20
The Apostle Peter also addresses slaves, encouraging them to endure suffering for doing good as a commendable act before God:
"Servants, submit yourselves to your masters with all respect, not only to those who are good and gentle, but even to those who are unreasonable. For if anyone endures the pain of unjust suffering because he is conscious of God, this is to be commended." (1 Peter 2:18-19)

These passages collectively emphasize a mutual respect and accountability between slaves and masters, rooted in their shared faith and ultimate accountability to God. The instructions call for a transformation of the master-slave relationship, reflecting the principles of Christian love, justice, and equality before God.