(98) باب فِي الْعُطَاسِ
Abu Hurairah reported the Messenger of Allah (May peace be upon him) as saying:
There are five qualities which a Muslim should display to his brother : return of salutation, response to the one who sneezes, acceptance of the invitation, paying sick visit to a patient, and accompanying the funeral.
Reference: Sunan Abi Dawud 5030
In-book reference: Book 43, Hadith 258
English translation: Book 42, Hadith 5012