"The nations wish to vex the Lord, but cannot. So what do they do? They vex Israel. " ~~ Exodus (Shmot) R.
"In a war of defense everyone comes out to fight, even the groom from his chamber and the bride from her bed." ~~ Sota 8:7
"One does not wage war, whether profane or holy, before one offers peace, as it is written [Deuteronomy (Devarim) 20:10]—When you come near a city to fight against it, then proclaim peace unto it! " ~~ Rambam
"If your enemy be hungry, give him bread to eat, and if he be thirsty, water to drink! " ~~ Proverbs (Mishle) 25:21
"Two dogs were bad friends. One day the wolf attacked one of them. Quoth the other: “If I do not help him today, the wolf will destroy him and tomorrow attack me.” So they joined forces and killed the wolf." ~~ Talmud, Sanhedrin
"If he is a fighter, he is no writer; if a writer, no fighter." ~~ Talmud, Avoda Zara
"Who is a hero? The man that turns an enemy into a friend." ~~ Avot Derabbi Nathan
"Rejoice not when your enemy falls and let not your heart be glad when he stumbles! " ~~ Proverbs (Mishle) 24:17
"If you are a man of the sword, you can’t claim to be a man of the book; and if you are a man of the book, you will not be a man of the sword." ~~ Talmud, Avodah Zarah 17b
"Because of war, old age creeps up on you. Of Joshua, after waging war with thirty-one kings, it is said: And Joshua became old and stricken in years." ~~ Tanchuma
"When God is with you, fear not foe!" ~~ Ladino Proverb
"It is the way of a man to wage war, not the way of a woman." ~~ Talmud, Kiddushin