The Book of Mosques and Places of Prayer
5/17. Chapter:
Prohibiting one who has eaten garlic, onions, or leeks, and other things that have an offensive odor from coming to the masjid, until that smell has gone away, and such a person should be expelled from the masjid
Sahih Muslim
وَحَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا إِسْمَاعِيلُ، - يَعْنِي ابْنَ عُلَيَّةَ - عَنْ عَبْدِ الْعَزِيزِ، - وَهُوَ ابْنُ صُهَيْبٍ - قَالَ سُئِلَ أَنَسٌ عَنِ الثُّومِ، فَقَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ أَكَلَ مِنْ هَذِهِ الشَّجَرَةِ فَلاَ يَقْرَبَنَّا وَلاَ يُصَلِّي مَعَنَا " .
Ibn Suhaib reported: Anas was asked about the garlic; he stated that the Messenger of Allah (ﷺ) had said: He who eats of this plant (garlic) should not approach us and pray along with us.
Reference : Sahih Muslim 562In-book reference : Book 5, Hadith 88USC-MSA web (English) reference : Book 4, Hadith 1143