Sahih al-Bukhari, Volume 8, Book 76, Hadith 579 (USC-MSA) ⓘ
Narrated Ibn `Umar: The Prophet 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).
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 " .
also referenced under: Book 81, Hadith 165 (In-Book) & Hadith 6577 (DarusSalam)