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Narrated `Abdul `Aziz: It was said to Anas "What did you hear the Prophet (ﷺ) saying about garlic?" Anas replied, "Whoever has eaten (garlic) should not approach our mosque."
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا عَبْدُ الْوَارِثِ، عَنْ عَبْدِ الْعَزِيزِ، قَالَ قِيلَ لأَنَسٍ مَا سَمِعْتَ النَّبِيَّ صلى الله عليه وسلم فِي الثُّومِ فَقَالَ " مَنْ أَكَلَ فَلاَ يَقْرَبَنَّ مَسْجِدَنَا ".
sunnah.com