Before you there will be a pond the distance between whose sides is like that between Jarbah and Adhruh. (Using translation from Abū Dāʾūd 4745)
قَالَ رَسُولُ اللهِ ﷺ إِنَّ أَمَامَكُمْ حَوْضًا مَا بَيْنَ نَاحِيَتَيْهِ كَمَا بَيْنَ جَرْبَاءَ وَأَذْرُحَ