Sahih Bukhari
Wedlock, Marriage (Nikaah)
Volume: 007 / Book Number: 062 / Hadith Number: 67
Narrated Abu Huraira:
The Prophet said, "A matron should not be given in marriage except after consulting her; and a virgin should not be given in marriage except after her permission." The people asked, "O Allah's Apostle! How can we know her permission?" He said, "Her silence (indicates her permission)."