"A previously married woman should not be married until her permission has been sought, and a virgin should not be married until her consent is sought." They said: "O Messenger of Allah, how does she give her permission?" He said: "Her permission is if she keeps silent." (Using translation from Nasāʾī 3265)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ «لَا تُنْكَحُ الثَّيِّبُ حَتَّى تُسْتَأْذَنَ وَلَا تُنْكَحُ الْبِكْرُ حَتَّى تُسْتَأْمَرَ» قَالُوا يَا رَسُولَ اللهِ كَيْفَ إِذْنُهَا؟ قَالَ «إِذْنُهَا أَنْ تَسْكُتَ»