[Abu 'Eisa said:] We do not know of this Hadith to be Marfu' except from this route. Isma'il bin Muslim Al-Makki was graded weak in Hadith due to his memory. As of Isma'il bin Muslim Al-'Abdi Al-Basri, Waki' said: "He is trustworthy." It has been reported from Al-Hasan as well. What is correct is from Jundab in Mawquf form.
This Hadith is acted upon according to some of the people of knowledge among the Companions of the Prophet (saws) and others, and it is the view of Malik bin Anas. As-Shafi'i said that the Sahir is only killed when the magic he practises reaches the level of disbelief, when his behavior is less than disbelief, the he did not see that he should be killed.