Riyad as-Salihin, Book 12, Hadith 1322 (In-Book) ⓘ
Anas (May Allah be pleased with him) reported: The Messenger of Allah said, "He who supplicates sincerely for martyrdom, it will be granted to him even though he is not killed on the battlefield."[Muslim].
وعن أنس رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم: "من طلب الشهادة صادقًا أعطيها ولو لم تصبه" ((رواه مسلم)).