Acts 7:26
On the following day, also, he appeared to them while they were fighting and he was urging them to peace, saying, 'Men, ye are brethren; why do ye wrong one another?'
1 Corinthians 6:5-8
I speak to your shame! Is it so, that there is not among you even one wise man, who will be able to judge between his brethren?
Hebrews 13:1
Let brotherly love continue.
1 Peter 3:8
And, finally, be ye all of one mind, compassionate, loving as brethren, tender-hearted, humble-minded;
1 John 3:11-13
because this is the message which ye heard from the beginning, that we should love one another;