It is narrated from Sayyiduna Umar (may Allah be pleased with him) that on the day of the Battle of Khaybar, some companions of the Prophet (peace and blessings be upon him) were seen coming from the front, saying, "So-and-so is also a martyr, so-and-so is also a martyr," until they passed by a man about whom they also said, "He is also a martyr." The Prophet (peace and blessings be upon him) said: "Never! I have seen him in Hell because he stole a cloak from the spoils of war." After that, the Prophet (peace and blessings be upon him) said: "O Ibn Khattab! Go and announce among the people that only the believers will enter Paradise." So I went out and began to announce that only the believers will enter Paradise.