Onion
In Islamic traditional medicine (Tibb an-Nabawi) and classical Arabic pharmacology, Onion—known in Arabic as Al-Basal (الْبَصَل)—holds a prominent place. It is recognized by classical physicians like Ibn Qayyim al-Jawziyya (Zad al-Ma’ad) as a potent medicinal vegetable that offers remarkable health benefits, despite specific social etiquettes regarding its consumption before public gatherings.
Benefits in Tibb an-Nabawi (Ibn Qayyim)
In Zad al-Ma’ad, Ibn Qayyim categorizes onions (especially when cooked or consumed moderately) according to several traditional medical properties:
Appetite and Digestion: Raw onions stimulate digestive secretions, open up blockages in the stomach and liver, and improve appetite.
Warming and Cleansing: They possess a hot and dry temperament in the third degree, which helps cut through stubborn phlegm, clear cold-induced chest congestion, and expel internal waste.
Topical Application: Historically, roasted or crushed onions were applied topically as a warm poultice to mature boils, reduce swelling, and soothe insect stings or joint aches.
📖 Hadith Reference
The Hadith narrations concerning Onion (Al-Basal), along with garlic (Ath-Thawm) and leeks (Al-Kurrath), are extensively documented in the primary authentic (Sahih) Hadith collections.
Rather than focusing on therapeutic prescriptions, the Prophetic traditions primarily establish social etiquette, public consideration, and ritual cleanliness (Taharah), while explicitly affirming that onions are lawful (Halal) and wholesome food.
- Prohibition of Attending the Mosque After Eating Raw Onions
The most well-known authentic narrations prohibit a person who has eaten raw onions from joining congregational prayer in the mosque until the strong odor has dissipated.
A. Narration from Jabir bin 'Abdullah (RA)
Narrated Jabir bin 'Abdullah (may Allah be pleased with him): "The Prophet (ﷺ) said: 'Whoever eats garlic or onion, let him keep away from us,' or 'let him keep away from our mosque and stay in his house.'"
In another wording in Sahih Muslim: 'Whoever eats of these pungent plants—garlic, onions, or leeks—should not approach our mosque, for the angels are offended by that which offends human beings.'"
Primary Sources:
Sahih al-Bukhari: Hadith #854 & #855
Sahih Muslim: Hadith #564
Grading: Muttafaq 'Alayh (Highest level of authenticity).
B. Narration from Ibn 'Umar (RA)
Narrated 'Abdullah bin 'Umar (may Allah be pleased with him): "During the Battle of Khaybar, the Messenger of Allah (ﷺ) said regarding the garlic plant: 'Whoever eats from this plant should not approach our mosque.'" (The same ruling applies to onions and leeks, as recorded in parallel narrations in Muslim).
Primary Sources:
Sahih al-Bukhari: Hadith #5452
Sahih Muslim: Hadith #561
- Clarification on Halal Status: Onions are Lawful Food
Because some Companions initially thought the strict instruction not to enter the mosque meant onions were forbidden (Haram), the Prophet (ﷺ) explicitly clarified their status.
A. Clarification to the Companions
Narrated Abu Sa'id al-Khudri (may Allah be pleased with him): "We made a conquest and obtained garlic, and the people ate heavily from it. Then they went to the mosque, and the Messenger of Allah (ﷺ) noticed the smell and said: 'Whoever eats from this bad-smelling plant, let him not approach our mosque.' The people said: 'It has been forbidden! It has been forbidden!' When this reached the Prophet (ﷺ), he said: 'O people, it is not for me to forbid what Allah has made lawful for you, but it is a plant whose smell I dislike.'"
Primary Source: Sahih Muslim (Hadith #565)
Grading: Sahih (Authentic).
- Neutralizing the Odor by Cooking
Classical Hadith commentators (such as Imam an-Nawawi in Sharh Sahih Muslim) note that cooking or boiling onions removes the sharp, volatile sulfur compounds that cause bad breath, thereby removing the restriction on entering the mosque.
A. Caliph 'Umar bin al-Khattab's Khutbah (Sermon)
'Ma'dan bin Abi Talhah reported that 'Umar bin al-Khattab (may Allah be pleased with him) delivered a Friday sermon and said: "O people, you eat two plants which I do not see except as bad plants: these onions and garlic. I saw the Messenger of Allah (ﷺ), if he found their smell coming from a man in the mosque, order that he be led out to Al-Baqi'. So whoever eats them, let him deaden their smell by cooking them."
Primary Source: Sahih Muslim (Hadith #567)
Grading: Sahih (Authentic).
⚗️ Preparation Method
Raw vs. Cooked: Raw onions provide the highest concentration of active sulfur compounds and vitamin C, making them ideal for circulatory and antimicrobial support. Cooking or roasting onions softens their sharp bite, making them gentler on sensitive stomachs while concentrating their sweet, comforting qualities for digestive tonics.
The Breath Mitigation: Traditional culinary wisdom pairs raw onions with fresh herbs (like mint or parsley) or lemon juice, which naturally neutralize volatile sulfur compounds and freshen the breath.
🤲 Dua / Ruqyah
Onions (Al-Basal) are explicitly mentioned by name in the Quran, making them one of the few vegetables specifically cited in the divine text.
The Quranic Ayah Reference
The mention appears in Surah Al-Baqarah, where the Children of Israel complain to Prophet Musa (Moses) about receiving only one type of food (Manna and Salwa) in the desert and demand a return to the varied crops of Egypt:
> وَإِذْ قُلْتُمْ يَا مُوسَىٰ لَن نَّصْبِرَ عَلَىٰ طَعَامٍ وَاحِدٍ فَادْعُ لَنَا رَبَّكَ يُخْرِجْ لَنَا مِمَّا تُنبِتُ الْأَرْضُ مِن بَقْلِهَا وَقِثَّائِهَا وَفُومِهَا وَعَدَسِهَا وَبَصَلِهَا ۖ قَالَ أَتَسْتَبْدِلُونَ الَّذِي هُوَ أَدْنَىٰ بِالَّذِي هُوَ خَيْرٌ ۚ اهْبِطُوا مِصْرًا فَإِنَّ لَمَّا سَأَلْتُمْ_
> "And [recall] when you said, 'O Moses, we can never endure one [kind of] food. So call upon your Lord to bring forth for us from what the earth grows: from its herbs, its cucumbers, its garlic, its lentils, and its onions (basaliha).' [Moses] said, 'Would you exchange what is better for what is less? Go down into [any] settlement and indeed, you will have what you have asked.'"
> — Surah Al-Baqarah (2:61)
>
Classical Exegesis (Tafsir) Insights
- The Arabic Term: The word used in the Ayah is بَصَلِهَا (basaliha), which translates directly to "its onions."
- Context of the Verse: Classical commentators (such as Ibn Kathir and Al-Qurtubi) explain that the Children of Israel were expressing ingratitude for the divine, effortless provision of Manna and Salwa that was sent down to them in the wilderness. They longed for the heavy, earth-bound labor and the pungent, common vegetables of Egyptian agriculture.
- The Lesson: Prophetic exegetes point out that while onions are completely lawful (Halal) and packed with health benefits, the Quran uses this request as a moral lesson against trading spiritual blessings and divine sustenance for mundane, base desires.
🔬 Modern Scientific Notes
Modern scientific research validates many of the traditional medicinal claims associated with onions, highlighting a dense matrix of protective phytochemicals:
Quercetin (A Powerful Flavonoid): Onions are one of the richest dietary sources of quercetin. It is a potent antioxidant that lowers systemic inflammation, fights free radicals, supports cardiovascular health, and acts as a natural antihistamine.
Organosulfur Compounds (Allicin derivatives): Responsible for the pungent aroma and tear-inducing properties when sliced. These sulfur compounds possess strong antimicrobial, antifungal, and immune-boosting properties.
Inulin & Fructooligosaccharides (Prebiotic Fiber): Feed beneficial gut bacteria, supporting a healthy microbiome and optimal digestive health.
Vitamins & Minerals: High in Vitamin C, Vitamin B6, Folate, and Potassium, supporting immune response and metabolic health.