Ibn Abbas asked, "Do you know how vast Hell is?"I replied, "No."He said, "Indeed, by Allah, you do not know. Between the earlobe of one of its inhabitants and his shoulder is a distance of seventy years' travel, through which flow valleys of pus and blood."I asked, "Rivers?"He answered, "No, rather valleys."Then he said, "Do you know how vast Hell is?"I replied, "No."He said, "Indeed, by Allah, we do not know. Ayesha told me that she asked the Messenger of Allah ﷺ about His saying, "And the earth entirely will be within His grip on the Day of Resurrection, and the heavens will be folded in His right hand" [Zumar 39:67], 'Where will the people be on that Day, Messenger of Allah?' He replied, 'They will be upon the bridge over Hell.'"
قال ابن عباس: أتدري ما سعة جهنم؟ قلت: لا قال: أجل، والله ما تدري، إن بين شحمة أذن أحدهم وبين عاتقه مسيرة سبعين خريفا، تجري فيها أودية القيح والدم، قلت: أنهارا؟ قال: لا، بل أودية، ثم قال أتدرون ما سعة جهنم؟ قلت: لا، قال: أجل، والله ما ندري حدثتني عائشة أنها سألت رسول الله ﷺ عن قوله: {والأرض جميعا قبضته يوم القيامة والسموات مطويت بيمينه} [الزمر: ٦٧] فأين الناس يومئذ يا رسول الله؟ قال: هم على جسر جهنم.
Ahmad (24856), Hakim (2/436), and Baghawi in Sharh al-Sunnah (4415) all narrated it through various chains from Abdullah bin Mubarak, from Anbasah bin Saeed, from Habib bin Abu Amra, from Mujahid, who said, then he mentioned it. Its chain is sahih, except that the first part of it is mawquf as far as its ruling regarding being raised to the Prophet is concerned. Hakim said, "This is a hadith sahih in chain."As for what was narrated from Ibn Umar, from the Prophet ﷺ, "The people of the Fire will grow so large in the Fire that the distance from the earlobe of one of them to his shoulder will be a journey of seven hundred years, the thickness of his skin will be seventy cubits, and his molar tooth will be like Uhud," its chain is daif. Ahmad (4800) and Tabarani in al-Kabir (12/402) both narrated it through the hadith of Abu Yahya al-Tawil, from Abu Yahya al-Qattat, from Mujahid, from Ibn Umar, who mentioned it. Abu Yahya al-Tawil and his teacher Abu Yahya al-Qattat are both daif.