Sunan an-Nasai 18012
In-book no 3276أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ عَمْرٍو، قَالَ حَدَّثَنَا أَبُو سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " تُسْتَأْمَرُ الْيَتِيمَةُ فِي نَفْسِهَا فَإِنْ سَكَتَتْ فَهُوَ إِذْنُهَا وَإِنْ أَبَتْ فَلاَ جَوَازَ عَلَيْهَا " .
It was narrated that Abu Hurairah said: "The Messenger of Allah said: 'An orphan girl should be consulted with regard to marriage, and if she remains silent, that is her permission. If she refuses then she is not to be forced.'"