Behold, I shall be present ahead of you on the Cistern, and the distance between its different sides would be like that between Sana' and Aila, and its jugs would be like stars in the sky.  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ أَلاَ إِنِّي فَرَطٌ لَكُمْ عَلَى الْحَوْضِ وَإِنَّ بُعْدَ مَا بَيْنَ طَرَفَيْهِ كَمَا بَيْنَ صَنْعَاءَ وَأَيْلَةَ كَأَنَّ الأَبَارِيقَ فِيهِ النُّجُومُ  

Behold, I shall be present ahead of you on the Cistern, and the distance between its different sides would be like that between Sana' and Aila, and its jugs would be like stars in the sky. (Using translation from Muslim 2305a)  

عَنْ رَسُولِ اللهِ ﷺ قَالَ «أَنَا فَرَطُكُمْ عَلَى الْحَوْضِ وَإِنَّ بُعْدَ مَا بَيْنَ طَرَفَيْهِ كَمَا بَيْنَ صَنْعَاءَ وَأَيْلَةَ كَأَنَّ الْأَبَارِيقَ فِيهِ النُّجُومُ»  

"أَلَا إِنِّى فَرَطٌ لكُمْ عَلَى الحَوْضِ، وَإِنَّ بُعْدَ مَا بَيْنَ طرَفيه مثلَ مَا بَيْنَ صَنْعَاءَ وَأيْلَةَ كأَن الأَبَارِيق فيه النُّجُومُ".