Jami` at-Tirmidhi Book 49, Hadith 93
that the Messenger of Allah (ﷺ), Abu Bakr, 'Umar, and 'Uthman climbed Uhud (mountain) and it shook them, so the Prophet of Allah (ﷺ) said: "Be firm O Uhud! For there is none upon you except a Prophet, a Siddiq, and two martyrs."
that the Messenger of Allah (ﷺ) was at Hira, him, Abu Bakr, 'Umar, 'Uthman, 'Ali, Talhah and Az-Zubair (may Allah be pleased with them all), and the boulder (mount Hira) shook. So the Prophet (ﷺ) said: "Be calm, for there is none upon you except a Prophet, or a Siddiq, or a martyr."
that the Messenger of Allah (ﷺ) said: "For every Prophet there is a friend (Rafiq), and my friend" - meaning in Paradise - "is 'Uthman."