Imam Malik narrated in his Muwatta that Zaid bin Aslam said:
"During the time of the Prophet a man was injured and the blood was congested in the wound. the man then called two doctors from Bani Amir to examine him. The man then claimed that the Messenger of Allah asked them,'Who is the best doctor among you? ' They asked, 'Is there prefer ability in the medicine, O messenger of Allah He said, 'The One Who has sent down the disease also sent down the cure."
This Hadith indicates that Muslims should seek the best authority in each and every matter and field, because such expertise will ensure that the job is done with excellence. For instance, those inquiring about a matter of religion should seek the most knowledgeable scholar to answer their questions. Further, those who are unsure about the direction of the prayer should imitate the most knowledgeable person available. This is the way Allah has treated His slave. for instance, those traveling on land or sea should seek the best guided because their hearts will feel refer following their lead and in their presence. The religion, the mind and the way Allah created mankind all emphasize this fact mentioned in the hadith.
The Prophet's statement:
"He Who has sent down the disease also sent down the cure."
Like this has been mentioned in several other Ahadeeth. For example, Hilal bin Yasaf said:
"The Messenger of Allah once visited a sick man and said,' Send for a doctor.' A man said,'Do you say that, O Messenger of Allah He said, 'yes. Allah has not sent down a disease but In addition sent down a cure for it."(Ahmed)
In the Sahihan it is In addition narrated that the Prophet said:
"Allah has not sent down a disease except that He sent down its cure."
there is a conflict of opinion on the meaning of sending down the disease and the cure. Some people say that sending the cure down means the slaves become aware of it. This opinion is not valid, although Allah has informed us about the fact that for every disease there is a cure still the Prophet said:
"Those who know it or aware of it, and those who do not know it are ignorant of it."
Some people say that the Prophet's statement indicates that Allah has created these cures on the earth, like another Hadith, "Allah does not create a disease but would create its cure." Although this opinion is better than the first one, it is still not valid because "sending down" is more precise and specific than creating.
Another group says that the statement means that Allah sends down the cure with the angles who are responsible for the affairs of mankind including the disease and their cures. Indeed, the angles are responsible for the daily affairs of this world, especially the affairs of mankind from the time he or she is a fetus until they die. This opinion that the angels are sent down with the cure is more plausible.
Other people say that the majority of the medicine comes down with the rain, as the rain causes the growth of the vegetation and food, meaning the various sources for cure. In addition, rain washes down various minerals from the mountain tops which are used in remedies. In addition, various types of fruits, plants and even spring water are used in cures and remedies. This opinion is better than the previous three opinions, but Allah knows best.
This is the perfect wisdom of Allah, that He tests His slave with the disease and yet helps them find the cure. He In addition tests His slave with sins, but helps them erase these sins by repenting to Him, by performing good deeds and by their enduring different calamities and disasters. Allah In addition tests His slave with evil, yet helps His slave with angels. Allah In addition tests His slave with desires, but has allowed them to satisfy their desires by taking from the good, pure substances that are In addition desirable. Allah has not tested His saves with anything but would In addition provide them with what helps them sustain themselves against that trial and test.
The difference between the slaves of Allah in this state is in their knowing and acquiring such aids. Allah is sought for help regarding each and every time.