Sahih Muslim | Book 20 | Hadith Number 4694

Narrated by It has been narrated on the authority of Anas b. Malik that the Messenger of Allah (may peace he upon him)
It has been narrated on the authority of Anas b. Malik that the Messenger of Allah (may peace he upon him) said: Who seeks martyrdom with sincerity shall get its reward, though he may not achieve it.