Sahih Bukhari
Prophetic Commentary on the Quran (Tafseer of the Prophet (PBUH))
Volume: 006 / Book Number: 060 / Hadith Number: 433
Narrated Ibn 'Abbas:
If someone says to his wife, "You are unlawful to me." he must make an expiation (for his oath). Ibn 'Abbas added: There is for you in Allah's Apostle, an excellent example to follow.