[Abu 'Eisa said:] This is a Gharib Hadith, we do not know of it except through the report of Yunus bin Muhammad, from Al-Mufaddal bin Fadalah, a Shaikh from Al-Basrah. There is another Shaikh from Al-Basrah named Al-Mufaddal bin Fadalah, who is more reliable han this one and more popular. Shu'bah reported this Hadith from Habib bin Ash-Shahid, from Ibn Buraidah: "That Ibn 'Umar took the hand of a leper" and the narration of Shu'bah is more appropriate to me and more correct.
In-book : Book 25, Hadith 31
English translation : Vol. 3, Book 23, Hadith 1817