Sahih (Sahih al-Bukhari)
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، حَدَّثَنِي نَافِعٌ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " أَمَامَكُمْ حَوْضٌ كَمَا بَيْنَ جَرْبَاءَ وَأَذْرُحَ ".
Narrated Ibn `Umar:The Prophet (ﷺ) said, "There will be a tank (Lake-Fount) in front of you as large as the distance between Jarba and Adhruh (two towns in Sham)