Sahih al-Bukhari Book 62, Hadith 37
Ibn `Umar asked me about some matters concerning `Umar. He said, "Since Allah's Messenger (ﷺ) died. I
have never seen anybody more serious, hard working and generous than `Umar bin Al-Khattab (till
the end of his life."
The Prophet (ﷺ) ascended the mountain of Uhud and he was accompanied by Abu Bakr, `Umar and `Uthman. The mountain shook beneath them. The Prophet (ﷺ) hit it with his foot and said, "O Uhud ! Be firm, for on you there is none but a Prophet, a Siddiq and a martyr (i.e. and two martyrs).
A man asked the Prophet (ﷺ) about the Hour (i.e. Day of Judgment) saying, "When will the Hour be?" The Prophet (ﷺ) said, "What have you prepared for it?" The man said, "Nothing, except that I love Allah and His Apostle." The Prophet (ﷺ) said, "You will be with those whom you love." We had never been so glad as we were on hearing that saying of the Prophet (i.e., "You will be with those whom you love.") Therefore, I love the Prophet, Abu Bakr and `Umar, and I hope that I will be with them because of my love for them though my deeds are not similar to theirs.