Sunan Ibn Majah, Chapter: The Chapters of Establishing the Prayer and the Sunnah Regarding Them

that Umar bin Khattab stood up one Friday to deliver a sermon, or, he delivered a sermon one Friday. He praised Allah, then he said: "O people, you eat two plants that I find are nothing but obnoxious; this garlic and this onion. At the time of the Messenger of Allah (saw), if a foul odour was detected from a man, I would see him seized by the arm and taken out to Al-Baqi'. Whoever must eat them, let him cook them to death." Daif