The Mahabharata describes how, when war between the Kauravas and the Pandavas became almost inevitable, Gandhari made one last appeal to her eldest son Duryodhana.
By making peace you honour your father and me, as well as your well-wishers... it is the wise man in control of his senses who guards his kingdom. Greed and anger drag a man away from his profits; by defeating these two enemies a king conquers the earth.... You will happily enjoy the earth, my son, along with the wise and heroic Pandavas.... There is no good in a war, no law (dharma) and profit (artha), let alone happiness; nor is there (necessarily) victory in the end – don’t set your mind on war...
Duryodhana did not listen to this advice and fought and lost the war.