Records Of The Colony Of New Plymouth In New England Page 173, Image 179 (1856) available at The Making of Modern Law: Primary Sources.

Laws of the Colony of New Plymouth (1675). Forasmuch as by frequent and sad experience it is found, that selling etc., of arms and ammunition to the Indians is very poisonous and destructive to the English, it is therefore ordered, decreed, and enacted by the council of war for this jurisdiction, that whosoever shall be found to sell, barter, or give, directly or indirectly, any gun or guns, or ammunition of any kind to any Indian or Indians, and the same legally proved against them, every such person or persons shall be put to death, and in defect of full and legal proof there, the printed law to take place.