Sahih Bukhari Volume 5, Book 59, Hadith Number 377.

Narrated By Jabir bin ‘Abdullah: On the day of the battle of Uhud, a man came to the Prophet and said, “Can you tell me where I will be if I should get martyred?” The Prophet replied, “In Paradise.” The man threw away some dates he was carrying in his hand, and fought till he was martyred.