Sahih Bukhari Volume 001, Book 003, Hadith Number 105.
Narated By Abu Bakra : The Prophet said. No doubt your blood, property, the sub-narrator Muhammad thought that Abu Bakra had also mentioned and your honor (chastity), are sacred to one another as is the sanctity of this day of yours in this month of yours. It is incumbent on those who are present to inform those who are absent." (Muhammad the Subnarrator used to say, "Allah's Apostle told the truth.") The Prophet repeated twice: "No doubt! Haven't I conveyed Allah's message to you.