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."  

سَمِعْتَ النَّبِيَّ ﷺ فِي الثُّومِ فَقَالَ مَنْ أَكَلَ فَلاَ يَقْرَبَنَّ مَسْجِدَنَا  

The Prophet ﷺ said, "Whoever has eaten garlic or onion should keep away from us (or should keep away from our mosque).'  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ أَكَلَ ثُومًا أَوْ بَصَلاً فَلْيَعْتَزِلْنَا أَوْ لِيَعْتَزِلْ مَسْجِدَنَا