Jami` at-Tirmidhi Book 49, Hadith 82
that the Messenger of Allah (ﷺ) said: "If there was to have a Prophet after me, it would have been 'Umar bin Al-Khattab."
"I don't think that a man who degrades Abu Bakr and 'Umar loves the Prophet (ﷺ)."
"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.'"