Esther 1:17 (ESV)

17 For the queen’s behavior will be made known to all women, causing them to look at their husbands with contempt, since they will say, ‘King Ahasuerus commanded Queen Vashti to be brought before him, and she did not come.’

Vashti’s deed of refusal was known to all the officials and nobles who had attended the banquet. The news was sure to spread, as soon as they returned to their provinces. The news of the queen’s disobedience could turn into a sort of slogan, inspiring other women to disobey their husbands (literally, lords).