Numbers 19
14 This is the law when death comes to a man in his tent: everyone who comes into the tent, and everyone who is in the tent, will be unclean for seven days.
15 Ref And every open vessel without a cover fixed on it will be unclean.
16 Ref And anyone touching one who has been put to death with the sword in the open country, or the body of one who has come to his end by a natural death, or a man's bone, or the resting-place of a dead body, will be unclean for seven days.