Ibne e Bakht Yashoo quoted that avoid eating egg and fish together as usage of both of them cause pain in teeth, cramp in stomach and Hemorrhoids
The ever use of egg produces blackish mild yellow wrinkles on face. Use of saltiest fish and after taking bath doing venesection causes itching and leprosy. The continual usage of eating kidney of goats produces infertility and having fresh fish and then taking a bath with cold water produces paralysis.
Hippocrates said the less usage of dangerous edibles, is better than eating advantageous things in excess. And bets protection of health, to avoid lethargy and by avoiding food on full stomach, Some physicians say that the one who wants to maintain his health he should use excellent food. He should eat when his stomach is completely empty and should drink water when he is craving with thirst. Along with that he should use water in less quantity. One should take rest after lunch and walk after dinner. After getting free from urination and taking poop he should sleep. Avoid going to wash room on a full stomach. Taking one bath in summer is better than having ten in winter. Having dry stale meat at night is equal to inviting death. Marrying an aged woman makes a young man old and makes a patient out of a healthy person.
Haris quotes that he who is happy with life even though life will never be everlasting then he should eat lunch early. And so is the case of dinner which should be taken early. And should use a thin shawl for wrapping body and should do less sex with woman.
Haris said four things destroy your health. Doing sex on a full stomach and taking a bath in such a state. Eating dry meat and marrying of a young with an aged person. When haris‘s death time came and people came to him and asked please give some last advice to us. He replied marry only the young woman, only that fruit should be one that has been ripened on a tree and eat in same season, as long as you can bear, avoid the medicine. Every month clear the stomach. That will eradicate bile and mucus and will produce flesh. If someone has lunch then he should rest for one hour and should eat at least 40 steps after dinner.
Some rulers said to their doctors that life is untreatable so write me some prescription. Then the physicians said that look only use meat of young animal and do not have a medicine if there is no illness and always use ripened fruit and always walk after meal. Don’t eat if you are not hungry. Don’t have sex with wife if she does not wish to. Never stop a urination. Take a bath only when you require and do not do it when it can destroy your health. If you have something in your stomach then do not eat. Never eat anything which you cannot chew as it will be difficult for the stomach to digest. Cleansing your stomach every week should be considered essential. Blood is the body’s treasure; therefore please don’t waste it without any purpose. And take bath as it takes out all the wastages of body from all the inside of a body which cannot be wasted with help of medicines.
Imam Shafi رحمتہ اللہ علیہ said that four things make body strong which is having meat, smelling perfume, taking a lot of baths and wearing a dress of linen.
Four things make a body weak, doing sex a lot, and being sad all the time, drinking a lot of water first thing in the morning and drinking a lot of citrus things.
Four things help the eye sight, sitting in front of Kaba, having kohl at night , looking at green and fresh things and keeping your sitting place clean.
Four things weaken the eye sight sitting at Qibla with your back at it, looking at waste, looking at a person being hanged on cross and looking at vagina of a woman.
Four things increase intelligence, avoiding useless talk, doing miswak, sitting in gathering of elderly and being in circles of scholars.
Aristotle said five things damage the body and sometimes even kill, being idle of a technician, separation of friends and swallowing their anger, kicking off advices and making fun of intelligent scholars by illiterate.
Mamoon ‘s physicians said adopt the habits of such person who likes to bend around corners by being lenient and he will not be a victim of any disease other than death however death is inevitable. .
Never eat anything when there is something in your stomach already; never eats anything which makes your mouth tired while chewing as stomach will not be able to digest. Do not do a lot of sex as it extinguishes the lamp of life.
Someone asked Hakim Galen that what is the reason of you not getting ill? He replied I do not mix two different foods, never eat on already eaten food, and never give space to something in stomach which might hurt it. (Riaz Hussain Makrwaal Mianwali)