מדרש על סנהדרין 222:2

From here they ruled: (The members of) an ass-caravan or a camel caravan that goes from place to place and rested within it, and they were turned astray with them — If it camped there for thirty days, they are put to death by the sword and their possessions are lost; if less than thirty days, they are put to death by stoning, and their possessions "escape."

(Ibid. 17:5) "Then you shall take out that man or that woman." Because we find that those who were incited are killed by the sword, I might think that the same applies to the inciters; it is, therefore, written (Ibid.) "the man or the woman and you shall stone them with stones and they shall die." Because we find that a "condemned city" is not declared through (the incitement of) an individual or of women, I might think that they are not liable (to the death penalty); it is, therefore, written (Ibid. 2) "a man or a woman who would do what is evil in the eyes of the L-rd your G-d, to break His covenant."