The Messenger of Allah ﷺ said, "I have been sent and the Hour is like this to this," or "like these two." And he held his index finger and middle finger together.
قال رسول الله ﷺ: بعثت أنا والساعة كهذه من هذه أو كهاتين. وقرن بين السبابة والوسطى.
Bukhari narrated it in "Divorce" (5301), and Muslim in "Tribulations" (2950), both through chains from Abu Hazim, from Sahl bin Saad, who mentioned it. The wording given is Bukhari's.