It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) that a young man of the Ansar had (in his heart) an intense fear of Hell. Whenever Hell was mentioned he would weep so much that because of it he became confined to his house. When this was mentioned before the Prophet (peace and blessings be upon him), he (peace and blessings be upon him) went to his house. When he (peace and blessings be upon him) entered upon him, the young man clung to him (peace and blessings be upon him) and (in that very state) collapsed and died. The Prophet (peace and blessings be upon him) said: "Prepare your companion for burial, for fear has torn his liver to pieces." This hadith has a sahih (authentic) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.