Sahih Bukhari
Prophetic Commentary on the Quran (Tafseer of the Prophet (PBUH))
Volume: 006 / Book Number: 060 / Hadith Number: 345
Narrated Abdullah:
Five things have passed, i.e. the smoke, the defeat of the Romans, the splitting of the moon, Al-Batsha (the defeat of the infidels in the battle of Badr) and Al-Lizam (the punishment)'