We were sitting in the shade of the chamber of the Messenger of Allah ﷺ discussing (something) and when we mentioned the last hour, our voices rose high. The Messenger of Allah ﷺ said: The last hour will not come or happen until there appear ten signs before it : the rising of the sun in its place of setting, the coming forth of the beast, the coming forth of Gog and Magog, the Dajjal (Antichrist), (the descent of) Jesus son of Mary, the smoke, and three collapses of the earth: one in the west, one in the east, and one in the Arabian Peninsula. The last of that will be the emergence of a fire from Yemen, from the lowest part of Aden, and drive mankind to their place of assembly. (Using translation from Abū Dāʾūd 4311)   

كُنَّا نَتَحَدَّثُ فِي ظِلِّ غَرْفَةٍ لِرَسُولِ اللهِ ﷺ فَذَكَرْنَا السَّاعَةَ فَارْتَفَعَتْ أَصْوَاتُنَا فَأَشْرَفَ عَلَيْنَا رَسُولُ اللهِ ﷺ مِنْ غُرْفَتِهِ فَقَالَ «عَمَّ يَتَسَاءَلُونَ؟» أَوْ «عَمَّ يَتَحَدَّثُونَ؟» قُلْنَا ذِكْرُ السَّاعَةِ فَقَالَ رَسُولُ اللهِ ﷺ إِنَّ السَّاعَةَ لَنْ تَكُونَ أَوْ لَنْ تَقُومَ حَتَّى يَكُونَ قَبْلَهَا عَشْرُ آيَاتٍ طُلُوعُ الشَّمْسِ مِنْ مَغْرِبِهَا وَخُرُوجُ الدَّابَّةِ وَخُرُوجُ يَأْجُوجَ وَمَأْجُوجَ وَالدَّجَّالُ وَعِيسَى ابْنُ مَرْيَمَ وَالدُّخَانُ وَثَلَاثَةُ خُسُوفٍ خَسْفٌ بِالْمَشْرِقِ وَخَسْفٌ بِالْمَغْرِبِ وَخَسْفٌ بِجَزِيرَةِ الْعَرَبِ وَآخِرُ ذَلِكَ نَارٌ تَخْرُجُ مِنْ قَعْرَةِ عَدَنٍ فَتَسُوقُ النَّاسَ إِلَى الْمَحْشَرِ  

[Machine] Abdullah bin Amr asked the Prophet ﷺ about the figures, and the Bedouin said, "A horn is blown in it."  

عَنْ عَبْدِ اللهِ بْنِ عَمْرٍو سَأَلَ أَعْرَابِيٌّ النَّبِيَّ ﷺ عَنِ الصُّورِ فَقَالَ «قَرْنٌ يُنْفَخُ فِيهِ»