Full Sharh — Riyad as-Salihin 1025
وعن عمر بن الخطاب رضي الله عنه أنه خطب يوم الجمعة فقال في خطبته: ثم إنكم أيها الناس تأكلون شجرتين ما أراهما إلا خبيثتين: البصل، والثوم -لقد رأيت رسول الله صلى الله عليه وسلم إذا وجد ريحهما من الرجل في المسجد أمر به، فأخرج إلى البقيع، فمن أكلهما، فليمتهما طبخًا. ((رواه مسلم)).
English Translation
It has been narrated that 'Umar (May Allah be pleased with him) said in the sermon of Friday prayer:: "O you people! You eat garlic and onion. I think the odour of these to be very offensive. I saw that if the Messenger of Allah (ﷺ) happened to find a man with such offensive odour in the mosque, he would order him to be taken out of the mosque and sent to Al-Baqi'. He who wants to eat any of these, should cook them till their odour dies out..
Source
Riyad as-Salihin(رياض الصالحين)
The Book of the Prohibited actions
Hadith Number
1025