The Seven Gates of Jahannam

About the statement: لَهَا سَبْعَةُ أَبْوَابٍ (It has seven gates - 44), according to a narration of Sayyidna ` Ali ؓ reported by Imam Alhmad, Ibn Jarir Al-Tabari and Al-Baihaqi, the seven gates of Jahannam (Hell) are in terms of seven levels, one upon the other. Some others have taken these as common gates where every gate will be reserved for a special kind of sinners. (Qurtubi)