The bowl most distasteful to God is a full stomach. All of the points mentioned in the hadith are each an antecedent to or result of the other. A full belly naturally causes excessive sleeping. Lastly, the one who is addicted to overeating and excessive sleeping will never be able to acquire certainty and deep conviction about the principles of faith. This is the case with most people in today's world, a fact that provides another decisive proof of the Prophethood of Muhammad, upon him be peace and blessings.
Many medical authorities state that kohl is useful for the nourishment of eyes and eyelashes.
Another substance, recommended by the Prophet, upon him be peace and blessings, and useful for health as an antibiotic and for its dermatological effect, is henna. Henna is better and more effective as an antiseptic and as a sterilizing agent than substances like tincture of iodine. This hadith contains many truths concerning therapy. A patient needs, particularly during the time of convalescence, foods rich in proteins, calories, and vitamins, and which are easily digestible. Scientific investigations have recently shown that all these properties are found in black cumin, a fact which shows that Muhammad, upon him be peace and blessings, was a Prophet taught by the All-Knowing.