A bedouin Arabi came up to the Messenger of Allah ﷺ and asked, "What is this pool of yours that you speak of?"He replied, "It is as vast as the distance between Sanaa and Busra, and then Allah will extend it for me with a channel so long that no human, of all those Allah has created, knows which of its two ends is which."Umar exclaimed, "Allahu Akbar!" Then he said, "As for the pool, the poor among the Muhajirin who fight in the way of Allah and die in the way of Allah will crowd around it, and I hope that Allah will bring me to that channel so I may drink from it."
قام أعرابي إلى رسول الله ﷺ فقال: ما حوضك الذي تحدث عنه؟ فقال: هو كما بين صنعاء إلى بصرى، ثم يمدني الله فيه بكراع لا يدري بشر ممن خلق أي طرفيه. قال فكبر عمر فقال: أما الحوض فيزدحم عليه فقراء المهاجرين الذين يقتتلون في سبيل الله ويموتون في سبيل الله، وأرجو أن يوردني الله الكراع فأشرب منه.
Ibn Hibban recorded it in his Sahih (6450) via the route of Mamar bin Yamar, who said, "Muawiya bin Salam narrated to us, saying, 'My brother Zayd bin Salam narrated to us that he heard Abu Salam, who said, "Amir bin Zayd Bakali narrated to me that he heard Utba bin Abdul-Sulami,"'" and then he related it.Ibn Abu Asim also recorded it in Sunnah (715) via the route of Abu Tuba Rabi bin Nafi, "Muawiya bin Salam narrated to us, that Abu Salam said, 'Amr bin Zayd Bakali informed me,'" with his isnad, in an abridged form. Here he dropped the intermediary between Muawiya bin Salam and Abu Salam, namely "his brother Zayd bin Salam."However, Bayhaqi recorded it in Bath (274) through another route from Abu Tuba, and there he confirmed the intermediary.Its isnad is hasan because of Amir bin Zayd Bakali, who is among the narrators mentioned in Tajil (505). When Husayni mentioned him, saying he is not well known, Hafiz responded, saying, "Rather, he is well known," and he elaborated at length in discussing him. The conclusion is that his hadith is hasan.