Sahih Al Bukhari Hadith Number 856

Narrated `Abdul `Aziz: A man asked Anas, “What did you hear from the Prophet (peace be upon him) about garlic?” He said, “The Prophet (peace be upon him) said, ‘Whoever has eaten this plant should neither come near us nor pray with us.”

10  Call to Prayers (Adhaan)
Hadith number 856
Volume no 1
Chapter: 160 (What has been said about uncooked garlic, onion and leek.)