Sahih al-Bukhari 7092
Sahih al-Bukhari · Book 92: Afflictions and the End of the World · “Al-Fitnah will appear from the east.”
Narrated Salim's father:
حَدَّثَنِي عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ ، حَدَّثَنَا هِشَامُ بْنُ يُوسُفَ ، عَنْ مَعْمَرٍ ، عَنِ الزُّهْرِيِّ ، عَنْ سَالِمٍ ، عَنْ أَبِيهِ ، عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ قَامَ إِلَى جَنْبِ الْمِنْبَرِ فَقَالَ " الْفِتْنَةُ هَا هُنَا الْفِتْنَةُ هَا هُنَا مِنْ حَيْثُ يَطْلُعُ قَرْنُ الشَّيْطَانِ ". أَوْ قَالَ " قَرْنُ الشَّمْسِ " .
The Prophet (ﷺ) stood up beside the pulpit (and pointed with his finger towards the East) and said, "Afflictions are there! Afflictions are there, from where the side of the head of Satan comes out," or said, "..the side of the sun.."