Sahih Muslim , Book 54, Hadith 62 (In-Book) ⓘ
Ibn Umar reported: I heard Allah's Messenger 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.
وَحَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا إِسْحَاقُ، - يَعْنِي ابْنَ سُلَيْمَانَ - أَخْبَرَنَا حَنْظَلَةُ، قَالَ سَمِعْتُ سَالِمًا، يَقُولُ سَمِعْتُ ابْنَ عُمَرَ، يَقُولُ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يُشِيرُ بِيَدِهِ نَحْوَ الْمَشْرِقِ وَيَقُولُ " هَا إِنَّ الْفِتْنَةَ هَا هُنَا هَا إِنَّ الْفِتْنَةَ هَا هُنَا " . ثَلاَثًا " حَيْثُ يَطْلُعُ قَرْنَا الشَّيْطَانِ " .
also referenced under: Hadith 2905 (Reference) & Book 41, Hadith 6942 (USC-MSA)