Genesis 13:8
"And Abram said unto Lot, Let there be no strife, I pray thee, between me and thee, and between my herdmen and thy herdmen; for we be brethren."
Cross References (ranked by relevance)
And the next day he shewed himself unto them as they strove, and would have set them at one again, saying, Sirs, ye are brethren; why do ye wrong one to another?
Behold, how good and how pleasant it is for brethren to dwell together in unity!
A soft answer turneth away wrath: but grievous words stir up anger.
It is an honour for a man to cease from strife: but every fool will be meddling.
Be kindly affectioned one to another with brotherly love; in honour preferring one another;
So he sent his brethren away, and they departed: and he said unto them, See that ye fall not out by the way.
And above all things have fervent charity among yourselves: for charity shall cover the multitude of sins.
And to godliness brotherly kindness; and to brotherly kindness charity.
Finally, be ye all of one mind, having compassion one of another, love as brethren, be pitiful, be courteous:
And when he went out the second day, behold, two men of the Hebrews strove together: and he said to him that did the wrong, Wherefore smitest thou thy fellow?
Follow peace with all men, and holiness, without which no man shall see the Lord:
Do all things without murmurings and disputings:
Let brotherly love continue.
Blessed are the peacemakers: for they shall be called the children of God.
A wrathful man stirreth up strife: but he that is slow to anger appeaseth strife.
Honour all men. Love the brotherhood. Fear God. Honour the king.
Seeing ye have purified your souls in obeying the truth through the Spirit unto unfeigned love of the brethren, see that ye love one another with a pure heart fervently:
But as touching brotherly love ye need not that I write unto you: for ye yourselves are taught of God to love one another.