Divorce
حَدَّثَنِي مُحَمَّدٌ، أَخْبَرَنَا عَبْدُ الْوَهَّابِ، حَدَّثَنَا يُونُسُ، عَنِ الْحَسَنِ، قَالَ زَوَّجَ مَعْقِلٌ أُخْتَهُ فَطَلَّقَهَا تَطْلِيقَةً.Narrated Al-Hasan:Ma'qil gave his sister in marriage and later her husband divorced her once
From Sahih al-Bukhari, whose reports the scholars accept as authentic.