Hatred does not cease by hatred, but only by love; this is the eternal rule. 
Buddha 
 

There are glances of hatred that stab and raise no cry of murder. 
George Eliot  
 
People hate, as they love unreasonably 
Thackeray  
 
No one can avoid entirely an inner struggle between love and hate. We are all challenged by it. The question in everyone's life is not whether this feeling of hate and aggression can be done away with, but whether it can be successfully modified. 
Norman Vincent Peale 
Smiley Blanton  
 
God comes not where reign timidity, hatred and fear 
Sri Ramakrishna 
 

..... Let not brother hate brother, nor sister hate sister..... 
The Vedas  
 

To the man who has begun hate himself, the gate to degeneration has already opened, and the same is true of a nation. 
Swami Vivekananda 
 
Weeds are the bane of fields, hatred is the bane of humankind; so a gift to those free of hate bears great fruit 
Dhammapada 
 
One cannot have the vision of God as long as one has these three- shame, hatred and fear 
Sri Ramakrishna 
 
Let us live happily, free from hatred in the midst of the hateful; let us remain free from hatred in the midst of people who hate 
Dhammapada 
 
There is no fire like passion, no bad luck like hatred. There is no misery like physical existence, no happiness higher than tranquillity 
Dhammapada