عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ ”لَوْ أَنَّ رَصَّاصَةً مِثْلَ هَذِهِ وَأَشَارَ إِلَى مِثْلِ جُمْجُمَةٍ أُرْسِلَتْ مِنَ السَّمَاءِ إِلَى الْأَرْضِ وَهِيَ مَسِيرَةُ خَمْسِمِائَةِ سَنَةٍ لَبَلَغَتِ الْأَرْضَ قَبْلَ اللَّيْلِ وَلَوْ أَنَّهَا أُرْسِلَتْ مِنْ رَأْسِ السِّلْسِلَةِ لَسَارَتْ أَرْبَعِينَ خَرِيفًا اللَّيْلَ وَالنَّهَارَ قَبْلَ أَنْ تَبْلُغَ أَصْلَهَا أَوْ قَعْرَهَا“
It is narrated from Sayyiduna Abdullah bin Amr, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: The distance between the earth and the sky is five hundred years’ journey. Even so, if a stone the size of a large bowl or a skull were dropped from the sky towards the earth, it would reach the earth before nightfall. But if it were dropped from one end of a chain downwards, it would keep descending for forty years before reaching its origin or bottom.