Ibn ‘Abbas said he was told by ‘Umar that on the day of Khaibar some of the Prophet’s companions came and said, So and so is a martyr and so and so is a martyr,” but when they came to a man about whom they said, "So and so is a martyr” God’s Messenger declared, "By no means, I have seen him in hell in a mantle (or cloak) which he took dishonestly.” God's Messenger then said, "Go, Ibn al-Khattab, and announce among the people three times that only the believers will enter paradise.” He said he went out and announced three times, "Only the believers will enter paradise.” Muslim transmitted it.