Abu Dawud said: He used to hear the salutation of the angels: When he cauterized, it stopped. When he abandoned, it returned to him.
In-book : Book 29, Hadith 11
English translation : Book 28, Hadith 3856
29. Medicine (Kitab Al-Tibb)
باب كَرَاهِيَةِ الْكَلاَمِ عِنْدَ الْحَاجَةِ