“Indeed, Allah has not sent down any illness without sending down with it a remedy.”

I say: This is a good chain of transmission. Its narrators are those of the two Sahih collections, apart from a slight weakness in al-Kirmani, to which al-Hafiz alluded in al-Taqrib: “Truthful, but makes mistakes.” For this reason, al-Dhahabi included him in Ma‘rifat al-Thiqat al-Mutakallam Fihim bima la Yujibu al-Radd (Knowing the Trustworthy Narrators Who Have Been Criticized in a Manner That Does Not Warrant Rejection) (p. 88).

The hadith has another route. Ahmad (5/371) said: Ishaq ibn Yusuf narrated to us: Sufyan narrated to us, from Mansur, from Hilal ibn Yisaf, from Dhakwan, from a man among the Ansar, who said: The Messenger of Allah, peace and blessings be upon him, visited a man who had a wound and said: “Call for him the physician of such-and-such clan.”

He said: So they summoned him, and he came. He said, “O Messenger of Allah, can medicine really avail anything?” He replied: “Glory be to Allah! Has Allah sent down any illness on earth without appointing for it a cure?”

I say: This is an authentic chain of transmission. Its narrators are trustworthy and are narrators of the two Sahih collections, except for the man from the Ansar, who was not named. Yet it appears that he was a Companion. This is why Ahmad placed the hadith under the heading, “Hadiths of Men among the Companions of the Prophet, peace and blessings be upon him.” In our view, all the Companions are upright. Nor do I consider it unlikely that he was Jabir ibn Abd Allah, who appears in the first chain, for he was among the Ansar. And Allah knows best.

Al-Haythami said in al-Majma‘ (5/84): “Ahmad narrated it, and its narrators are those of the Sahih.”