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: 6942
Ibn Umar reported: I heard Allah's Messenger (may peace be upon him) as saying while pointing his hands towards the east: The turmoil would appear from this side; verily, the turmoil would appear from this side (he repeated it thrice) where appear the horns of Satan.