The Mahabharata of Krishna-Dwaipayana Vyasa…
“ In what way should I behave so that this blazing prosperity that I have won and that scorches all my enemies may not desert me?' Thus addressed, Vrihaspati, skilled in Virtue, Profit, and Pleasure, possessed of a knowledge of kingly duties, and endued with great intelligence, answered Indra in the following words.""'"Vrihaspati said, 'One should never wish to subdue one's foes by quarrel. Excited with wrath and bereft of forgiveness, boys only seek quarrel. One that desires the destruction of a foe should not put that foe on his guard. ”
