A man whose face was covered with an iron mask (i.e. clad in armour) came to the Prophet (ﷺ) and said, "O Allâh's Messenger (ﷺ)! Shall I fight or embrace Islâm first?" The Prophet (ﷺ), said, "Embrace Islâm first and then fight." So he embraced Islâm, and was martyred. Allâh's Messenger (ﷺ) said, "A little work, but a great reward." [He did very little (after embracing Islâm), but he will be rewarded in abundance.] [4:63-0.B]