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: 6939
Ibn 'Umar reported that Allah's Messenger (may peace be upon him) stood by the door (of the apartment of) gafsa and, pointing towards the east, he said: The turmoil would appear from this side, viz. where the horns of Satan would appear, and he uttered these words twice or thrice and Ubaidullah b. Sa'ld in his narration said. The Messenger of Allah (may peace be upon him) had been standing by the door of 'A'isha.