Sahih Muslim
The Book on Salutations and Greetings (Kitab As-Salam)
Book Number: 026 / Hadith Number: 5459
This hadith has been reported on the authority of Abu Bishr with the same the same chain of transmitters (with these words): That he recited Umm-ul-Qur'an (Sura Fatiha), and he collected his spittle and he applied that and the person became all right.