Mishkat al-Masabih 5917 — Excellent Qualities and Description of the Prophet

Hudhaifa reported the Prophet as saying, "Among my companions (a version has, my people) there will be twelve hypocrites who will neither enter paradise nor experience its odour till a camel goes through a needle's eye. Eight of them will be repelled by an internal ulcer (a burning, fiery wick) which will appear on their shoulders and extend into their breasts." Muslim transmitted it.