Ephesians 2:14-18
14 For He Himself is our peace, who has made both one, and has broken down the middle wall of separation, 15 having abolished in His flesh the enmity, that is, the law of commandments contained in ordinances, so as to create in Himself one new man from the two, thus making peace, 16 and that He might reconcile them both to God in one body through the cross, thereby putting to death the enmity. 17 And He came and preached peace to you who were afar off and to those who were near. 18 For through Him we both have access by one Spirit to the Father.

Genesis 4:6-10
6 So the Lord said to Cain, “Why are you angry? And why has your countenance fallen? 7 If you do well, will you not be accepted? And if you do not do well, sin lies at the door. And its desire is [d]for you, but you should rule over it.”
8 Now Cain [e]talked with Abel his [f]brother; and it came to pass, when they were in the field, that Cain rose up against Abel his brother and killed him.
9 Then the Lord said to Cain, “Where is Abel your brother?”
He said, “I do not know. Am I my brother’s keeper?”
10 And He said, “What have you done? The voice of your brother’s blood cries out to Me from the ground.

Matthew 5:23-24
23 Therefore if you bring your gift to the altar, and there remember that your brother has something against you, 24 leave your gift there before the altar, and go your way. First be reconciled to your brother, and then come and offer your gift.

1 Corinthians 1:10-11
10 Now I plead with you, brethren, by the name of our Lord Jesus Christ, that you all [d]speak the same thing, and that there be no [e]divisions among you, but that you be perfectly joined together in the same mind and in the same judgment. 11 For it has been declared to me concerning you, my brethren, by those of Chloe’s household, that there are [f]contentions among you.

John 13:34-35
34 A new commandment I give to you, that you love one another; as I have loved you, that you also love one another. 35 By this all will know that you are My disciples, if you have love for one another.”

1 John 1:5-7
5 This is the message which we have heard from Him and declare to you, that God is light and in Him is no darkness at all. 6 If we say that we have fellowship with Him, and walk in darkness, we lie and do not practice the truth. 7 But if we walk in the light as He is in the light, we have fellowship with one another, and the blood of Jesus Christ His Son cleanses us from all sin.

Romans 12:9-21
9 Let love be without hypocrisy. Abhor what is evil. Cling to what is good. 10 Be kindly affectionate to one another with brotherly love, in honor giving preference to one another; 11 not lagging in diligence, fervent in spirit, serving the Lord; 12 rejoicing in hope, patient[c] in tribulation, continuing steadfastly in prayer; 13 distributing to the needs of the saints, given[d] to hospitality.
14 Bless those who persecute you; bless and do not curse. 15 Rejoice with those who rejoice, and weep with those who weep. 16 Be of the same mind toward one another. Do not set your mind on high things, but associate with the humble. Do not be wise in your own opinion.
17 Repay no one evil for evil. Have[e] regard for good things in the sight of all men. 18 If it is possible, as much as depends on you, live peaceably with all men. 19 Beloved, do not avenge yourselves, but rather give place to wrath; for it is written, “Vengeance is Mine, I will repay,” says the Lord. 20 Therefore
“If your enemy is hungry, feed him;
If he is thirsty, give him a drink;
For in so doing you will heap coals of fire on his head.”
21 Do not be overcome by evil, but overcome evil with good.