Sayyiduna Umar bin Khattab (may Allah be pleased with him) said in one of his sermons: O people! You eat two plants, garlic and onion; I consider them to be foul (disliked). By Allah! I saw the Noble Prophet (peace and blessings be upon him), whenever he sensed their smell from someone, he would order such that the person’s hand would be taken and he would be led out of the mosque, until he was brought to the Baqi’ place. If anyone must eat them, then he should cook them to eliminate their odor.

It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Whoever eats this plant (onion or garlic), let him not come to the houses of Allah (i.e., the mosques).

It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: Whoever eats from this tree, that is, garlic, should by no means come to our mosque and cause us harm. In another place, he said: Such a person should neither come near our mosque nor harm us with the smell of garlic.

Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) says: We had not gone beyond the conquest of Khaybar when we entered a field of greens, and the people were hungry, so we ate a lot of it. Then we went to the mosque, and when the Messenger of Allah (peace and blessings be upon him) perceived the smell, he said: Whoever has eaten from this foul (unpleasant) tree should not come near us in the mosque. The people began to say: It has become forbidden, it has become forbidden. When this news reached the Messenger of Allah (peace and blessings be upon him), he said: O people! I have no authority to make unlawful what Allah has made lawful. In reality, it is a tree whose smell I dislike.

It is narrated from Sayyiduna Jabir bin Abdullah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: Whoever eats garlic or onion should keep away from us or from our mosque and stay in his house.

Sayyiduna Mughira bin Shu’bah (may Allah be pleased with him) says that I ate garlic and came to the mosque of the Noble Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) had already performed one rak’ah, so when he (peace and blessings be upon him) finished the prayer, I stood up to complete one rak’ah. The Prophet (peace and blessings be upon him) sensed the smell of garlic and said: Whoever eats this vegetable should by no means come near our mosque until its smell is gone. Mughira bin Shu’bah (may Allah be pleased with him) says: After completing the prayer, I came to the Prophet (peace and blessings be upon him) and said: O Messenger of Allah! I have an excuse, please give me your hand. He says: By Allah, I found him gentle. The Prophet (peace and blessings be upon him) gave me his hand, then inserted it through my sleeve until it reached my chest and, feeling the bandage tied on my chest, said: Indeed, you have an excuse.