Hadith 5629
`Utba b. Ghazwan said: It was mentioned to us that a stone will be thrown from the lip of Jahannam and fall in it for the space of seventy years without reaching the bottom. 'I swear by God that Jahannam will certainly be filled. It was also mentioned to us that the space between the two halves of the gates of paradise is a distance of forty years journey, yet a day will come when they will be full because of the crowding. Muslim transmitted it.
وَعَنْ عُتْبَةَ بْنِ غَزْوَانَ قَالَ: ذُكِرَ لَنَا أَنَّ الْحَجَرَ يُلْقَى مِنْ شَفَةِ جَهَنَّمَ فَيَهْوِي فِيهَا سَبْعِينَ خَرِيفًا لَا يُدْرِكُ لَهَا قَعْرًا وَاللَّهِ لَتُمْلَأَنَّ وَلَقَدْ ذُكِرَ لَنَا أَنَّ مَا بَيْنَ مِصْرَاعَيْنِ مِنْ مَصَارِيعِ الْجَنَّةِ مَسِيرَةُ أَرْبَعِينَ سَنَةً وَلَيَأْتِيَنَّ عَلَيْهَا يَوْمٌ وَهُوَ كَظِيظٌ مِنَ الزحام ". رَوَاهُ مُسلم