Sahih al-Bukhari, Hadith 4936 ⓘ
Narrated Sahl bin Sa`d: I saw Allah's Messenger pointing with his index and middle fingers, saying. "The time of my Advent and the Hour are like these two fingers." The Great Catastrophe will overwhelm everything.
حَدَّثَنَا أَحْمَدُ بْنُ الْمِقْدَامِ، حَدَّثَنَا الْفُضَيْلُ بْنُ سُلَيْمَانَ، حَدَّثَنَا أَبُو حَازِمٍ، حَدَّثَنَا سَهْلُ بْنُ سَعْدٍ ـ رضى الله عنه ـ قَالَ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ بِإِصْبَعَيْهِ هَكَذَا بِالْوُسْطَى وَالَّتِي تَلِي الإِبْهَامَ " بُعِثْتُ وَالسَّاعَةَ كَهَاتَيْنِ " .
also referenced under: Book 65, Hadith 4936 (In-Book) & Volume 6, Book 60, Hadith 458 (USC-MSA)