Chapter 56: Fighting for the Cause of Allah (Jihaad)
Narrated Al-Bara: A man whose face was covered with an iron mask (i. e. clad in armor) came to the Prophet (ﷺ) and said,
"O Allah' s Messenger (ﷺ)! Shall I fight or embrace Islam first? "The Prophet (ﷺ) said, "Embrace Islam first and
then fight." So he embraced Islam, and was martyred. Allah' s Messenger (ﷺ) said, A Little work, but a great
reward. "(He did very little (after embracing Islam), but he will be rewarded in abundance).
Sahih al-Bukhari 2808