स्वयङ्कृतश्च कार्यार्थमकाले काल एव वा । मित्रस्य चैवापकृते द्विविधो विग्रहः स्मृतः ॥ १६४ ॥
War is declared to be of two kinds, (viz.) that which is undertaken in season or out of season, by oneself and for one’s own purposes, and (that waged to avenge) an injury done to a friend.