Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates this statement of the Noble Prophet (peace and blessings of Allah be upon him): "Ahead of you (on the Day of Resurrection) there will be a cistern as large as the distance between Jarba and Adhrah." (Imam Ibn Hibban, may Allah have mercy on him, says:) The distance between Jarba and Adhrah is as much as between Madinah and Oman, or between Makkah and Aylah, or between Sana'a and Madinah, or between Sana'a and Busra, so in this regard there is no contradiction or difference in these narrations.