Poisoned or barbed arrows should not be used. These are the weapons used by the wicked. One should fight fairly, without giving way to anger or desiring to kill.
यथार्थमेव योद्धव्यं न क्रुद्ध्येत जिघांसतः॥ साधूनां तु मिथो भेदात् साधुश्चेद व्यसनी भवेत्।