question #2 Sahih al-Bukhari 856, Book 10, Hadith 247 : Why might certain foods be discouraged before participating in communal prayers in Islam?

A man asked Anas, “What did you hear from the Prophet (ﷺ) about garlic?” He said, “The Prophet (ﷺ) said,
‘Whoever has eaten this plant should neither come near us nor pray with us.”