It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "'Wayl' is a valley in Hell; the disbeliever (once he begins to fall) will keep falling into its depths for forty years before reaching its bottom. And 'al-sa'ud' is a mountain of the Fire which he will keep climbing for seventy years, then he will fall from there (down), and it will go on like this forever." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Ali (may Allah be pleased with him) concerning this saying of Allah Almighty: "Every soul, for what it has earned, will be retained, except the companions of the right" [Al-Muddaththir: 38-39] , that he said: (By the companions of the right is meant) the children of the Muslims. This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.