Riyad as-SalihinChapter 11Hadith 643
Full Sharh — Riyad as-Salihin 643
وعن أنس رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم: "من طلب الشهادة صادقًا أعطيها ولو لم تصبه" ((رواه مسلم)).
English Translation
Anas (May Allah be pleased with him) reported:: The Messenger of Allah (ﷺ) said, "He who supplicates sincerely for martyrdom, it will be granted to him even though he is not killed on the battlefield.".
Source
Riyad as-Salihin(رياض الصالحين)
The Book of Jihad
Hadith Number
643