كتاب المناقب
Read the English translation first, with the original Arabic directly underneath.
Narrated `Abdullah bin `Umar:
I heard Allah's Messenger (ﷺ) on the pulpit saying, "Verily, afflictions (will start) from here," pointing towards the east, "whence the side of the head of Satan comes out."
أَلاَ إِنَّ الْفِتْنَةَ هَا هُنَا ـ يُشِيرُ إِلَى الْمَشْرِقِ ـ مِنْ حَيْثُ يَطْلُعُ قَرْنُ الشَّيْطَانِ