1 Corinthians 6:6
But [instead], a brother goes to court against his brother, and that in front of an unbelieving [judge]!
Acts 7:26
The next day Moses came across a couple of his relatives who were fighting and tried to settle their dispute by saying, 'Brothers, since you are fellow-countrymen, why are you hurting each other?'
1 Corinthians 6:1
If any one of you has a complaint against someone, how can you dare to take it before non-Christian judges [to be decided], instead of before the saints [i.e., God's holy people]?
1 Corinthians 6:7
Indeed, the fact that you have lawsuits with one another is [evidence of] a complete failure among you. Why should you not rather take the wrong? Why should you not rather accept being cheated?
2 Corinthians 6:14
Do not team up with unbelievers [i.e., in close relationships, such as marriage, etc.]. For what do righteousness and wickedness have in common? Or, what fellowship can light have with darkness?
Philippians 2:14-15
Do everything without complaining and arguing,
1 John 2:9-11
The person who claims to be living in [harmony with] the light [i.e., by obeying God's truth], and [yet] hates his brother is still [living] in the darkness [of sin].
1 John 3:11-15
[Now] this is the message that you people heard from the beginning [of Christ's ministry], that we should love one another [See Mark 12:31],