Sahih Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Volume: 005 / Book Number: 059 / Hadith Number: 323
Narrated Abu Musa:
That the Prophet said, "The good is what Allah gave us later on (after Uhud), and the reward of truthfulness is what Allah gave us after the day (of the battle) of Badr."