Jami` at-Tirmidhi Book 49, Hadith 83
"The Messenger of Allah (ﷺ) said: 'I saw that I was brought a cup of milk, so I drank from it, and I gave my leftover to 'Umar bin Al-Khattab.' They said: 'So what did you interpret it as O Messenger of Allah?' He said: '(It is) Knowledge.'"
that the Messenger of Allah (ﷺ) said: "If there was to have a Prophet after me, it would have been 'Umar bin Al-Khattab."
that the Prophet (ﷺ) said: "I entered Paradise and it was as if I was in a palace of gold. So I said: 'Whose palace is this?' They said: 'A youth's, from the Quraish.' So I thought that I was him. I said: 'And who is he?' They said: "'Umar bin Al-Khattab."