Sahih Al Bukhari Hadith Number 853

Narrated Ibn `Umar: During the holy battle of Khaibar the Prophet (peace be upon him) said, “Whoever ate from this plant (i.e. garlic) should not enter our mosque.”

10  Call to Prayers (Adhaan)
Hadith number 853
Volume no 1
Chapter: 160 (What has been said about uncooked garlic, onion and leek.)