Sahih Muslim
The Book Pertaining to the Turmoil and Portents of the Last Hour (Kitab Al-Fitan wa Ashrat As-Saah)
Book Number: 041 / Hadith Number: 6885
Abu Huraira reported Allah's Apostle (may peace be upon him) as saying: Today the wall (barrier) of Gog and Magog has been opened so much, and WUhaib (in order to explain it) made the figure of ninety with the help of his hand.