It is narrated from Hazrat Thawban (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: On the Day of Resurrection, I will be at the rear part of my reservoir and I will be pushing people away for the people of Yemen, and I will push them away with my staff until they are separated. Someone asked the Noble Prophet (peace and blessings be upon him): How wide will it be? The Noble Prophet (peace and blessings be upon him) said: Equal to the distance from here to Oman, in which two channels will flow and will increase its water.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22409