It is narrated from Sayyiduna Hudhayfah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, Allah is the Creator of every craftsman and his craft." This hadith is sahih (authentic) on the condition of Imam Muslim, but the two of them did not record it.

It is narrated from Sayyiduna Hakim bin Hizam (may Allah be pleased with him), he says: I said: "O Messenger of Allah! The incantations (ruqyah) with which we seek healing and the medicines with which we treat ourselves, can they avert anything of the decree of Allah?" He (peace and blessings be upon him) said: "They (the medicine and the supplication) are themselves part of the decree of Allah." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it. Imam Muslim, in his discussion of the mistakes Ma'mar made in Basrah, said that Ma'mar narrated it twice, once through the chain of al-Zuhri from Ibn Abi Khizamah from his father. Imam al-Hakim says: In my view this is not a defect, because Salih bin Abi al-Akhdar corroborated Ma'mar bin Rashid; and although Salih is from the third tier of al-Zuhri's students, narrators like him can be cited as supporting evidence.