1 Corinthians 7:15

but if the infidel will separate, let him go: a brother or a sister is not inslaved in such cases. but God has called us to peace; for how do you know,

Romans 14:19

Let us therefore pursue those things which tend to peace, and mutual edification.

1 Corinthians 14:33

for God is not the God of confusion, but of peace, in all christian assemblies.

Matthew 12:50

for whosoever shall do the will of my father, who is in heaven, he is my brother, and sister, and mother.

Romans 12:18

do all you can to live peaceably, if it be possible, with all mankind.

2 Corinthians 13:11

Finally, brethren, be cheerful: redress yourselves, encourage one another, be of one mind, live in peace; and the God of love and peace shall be with you.

Galatians 5:22

but the fruit of the spirit is love, joy, peace, patience, sweetness of disposition, beneficence, faithfulness, meekness, temperance:

Hebrews 12:14

seek peace with all men, and sanctity of life, without which no man shall see the Lord:

James 2:15

suppose one of your brethren should be destitute of cloths, and of his daily nourishment,

James 3:17-18

but wisdom deriv'd from heaven is first dispassionate, then pacific, equitable, and obsequious: full of beneficence, and all social virtue, free from partiality, and hypocrisy.

Treasury of Scripture Knowledge

Summary

But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.

General references

Bible References

A brother

Matthew 12:50
for whosoever shall do the will of my father, who is in heaven, he is my brother, and sister, and mother.
James 2:15
suppose one of your brethren should be destitute of cloths, and of his daily nourishment,

But

1 Corinthians 14:33
for God is not the God of confusion, but of peace, in all christian assemblies.
Romans 12:18
do all you can to live peaceably, if it be possible, with all mankind.
Romans 14:19
Let us therefore pursue those things which tend to peace, and mutual edification.
2 Corinthians 13:11
Finally, brethren, be cheerful: redress yourselves, encourage one another, be of one mind, live in peace; and the God of love and peace shall be with you.
Galatians 5:22
but the fruit of the spirit is love, joy, peace, patience, sweetness of disposition, beneficence, faithfulness, meekness, temperance:
Hebrews 12:14
seek peace with all men, and sanctity of life, without which no man shall see the Lord:
James 3:17
but wisdom deriv'd from heaven is first dispassionate, then pacific, equitable, and obsequious: full of beneficence, and all social virtue, free from partiality, and hypocrisy.

General references

Romans 12:18
do all you can to live peaceably, if it be possible, with all mankind.