Sahih al-Bukhari is a collection of hadiths about: Revelation, Belief, Knowledge, Ablutions (Wudu'), Bathing (Ghusl), Menstrual Periods, Prayers (Salat), Times of the Prayers, Eclipses, Hajj (Pilgrimage), Obligatory Charity Tax (Zakat), Fasting, Beginning of Creation, Prophets, Prophetic Commentary on the Qur'an, mariage and divorce.