It is narrated from al-Walid bin Abd al-Rahman bin Awf, from his father, from his grandfather, that the Messenger of Allah (peace and blessings be upon him) said: "Do not force your sick ones to eat and drink, for Allah, the Mighty and Majestic, feeds them and gives them drink." This hadith has a sahih (authentic) chain of narration and all its narrators are from Madinah, but the two Shaykhs (Bukhari and Muslim) did not record it. We also have, on this topic, the report of Imam Malik from Nafi', in narrating which from him Muhammad bin al-Walid al-Yashkuri is alone.