ENOfficial
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.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا شَيْبَانُ بْنُ فَرُّوخَ، حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، حَدَّثَنَا ثَابِتٌ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ طَلَبَ الشَّهَادَةَ صَادِقًا أُعْطِيَهَا وَلَوْ لَمْ تُصِبْهُ " .
sunnah.com