Hadith - Qudsi #18

O son of Adam, I fell ill and you visited Me not. He will say: O Lord, and how should I visit You when You are the Lord of the worlds? He will say: Did you not know that My servant So-and-so had fallen ill and you visited him not? Did you not know that had you visited him you would have found Me with him? O son of Adam, I asked you for food and you fed Me not. He will say: O Lord, and how should I feed You when You are the Lord of the worlds? He will say: Did you not know that My servant So-and-so asked you for food and you fed him not? Did you not know that had you fed him you would surely have found that (the reward for doing so) with Me? O son of Adam, I asked you to give Me to drink and you gave Me not to drink. He will say: O Lord, how should I give You to drink whine You are the Lord of the worlds? He will say: My servant So-and-so asked you to give him to drink and you gave him not to drink. Had you given him to drink you would have surely found that with Me.

 Sahih Bukhari, Book 25, Number 5466,

Narrated Jabir ibn Abdullah, Allah's Messenger (peace be upon him) said: There is a remedy for every malady, and when the remedy is applied to the disease it is cured with the permission of Allah, the Exalted and Glorious.

Sahih Bukhari, Book 70, Number 552
Narrated Abu Muisa Al-Ash'ari: The Prophet (peace be upon him) said, "Feed the hungry, visit the sick, and set free the captives."

Sahih Bukhari, Book 71, Number 582
Narrated Abu Huraira: The Prophet (peace be upon him) said, "There is no disease that Allah has created, except that He also has created its treatment."

Sahih Bukhari, Book 73, Number 40, Allah's Apostle (pbuh) said, "You see the believers as regards their being merciful among themselves and showing love among themselves and being kind, resembling one body, so that, if any part of the body is not well then the whole body shares the sleeplessness (insomnia) and fever with it."

Sahih Bukhari, Book 13, Number 5, Narrated Abu Said: I testify that Allah's Apostle said, "The taking of a bath on Friday is compulsory for every male Muslim who has attained the age of puberty and (also) the cleaning of his teeth with Siwak, and the using of perfume if it is available." Amr (a sub-narrator) said, "I confirm that the taking of a bath is compulsory, but as for the Siwak and the using of perfume, Allah knows better whether it is obligatory or not but according to the Hadith it is as above."

Sahih Bukhari, Book 13, Number 13, Narrated Anas: Allah's Apostle I said, "I have told you repeatedly to (use) the Siwak. (The Prophet put emphasis on the use of the Siwak.)  

Sahih Bukhari, Book 21, Number 237, Narrated Hudhaifa : Whenever the Prophet got up for Tahajjud prayer he used to clean his mouth (and teeth) with Siwak.  

Sahih Bukhari, Book 31, Number 154, Narrated Abu Huraira: The Prophet said, "If somebody eats or drinks forgetfully then he should complete his fast, for what he has eaten or drunk, has been given to him by Allah." Narrated 'Amir bin Rabi'a, "I saw the Prophet cleaning his teeth with Siwak while he was fasting so many times as I can't count." And narrated Abu Huraira, "The Prophet said, 'But for my fear that it would be hard for my followers, I would have ordered them to clean their teeth with Siwak on every performance of ablution." The same is narrated by Jabir and Zaid bin Khalid from the Prophet who did not differentiate between a fasting and a non-fasting person in this respect (using Siwak). Aisha said, "The Prophet said, "It (i.e. Siwak) is a purification for the mouth and it is a way of seeking Allah's pleasures." Ata' and Qatada said, "There is no harm in swallowing the resultant saliva."  

Sunan Abu-Dawud, Book 28, 3846
Narrated Usamah ibn Sharik: I came to the Prophet (peace be upon him) and his Companions were sitting as if they had birds on their heads. I saluted and sat down. The desert Arabs then came from here and there. They asked: Apostle of Allah, should we make use of medical treatment? He replied: Make use of medical treatment, for Allah has not made a disease without appointing a remedy for it, with the exception of one disease, namely old age.

Sunan Abu-Dawud, Book 28, 3861
Narrated AbuHurayrah: The Apostle of Allah (peace be upon him) prohibited unclean medicine.

Sunan Abu-Dawud, Book 28,3865
Narrated AbudDarda: The Prophet (peace be upon him) said: Allah has sent down both the disease and the cure, and He has appointed a cure for every disease, so treat yourselves medically, but use nothing unlawful.