Sahih Bukhari Volume 9, Book 83, Hadith Number 9.

Narrated By 'Abdullah bin 'Amr : The Prophet said, "Al-Kaba'ir (the biggest sins) are: To join others (as partners) in worship with Allah, to be undutiful to one's parents," or said, "to take a false oath." (The sub-narrator, Shu'ba is not sure) Mu'adh said: Shu'ba said, "Al-kaba'ir (the biggest sins) are:   Joining others as … Continue reading Sahih Bukhari Volume 9, Book 83, Hadith Number 9.

Sahih Bukhari Volume 9, Book 83, Hadith Number 12.

Narrated By 'Ubada bin As-Samat : I was among those Naqibs (selected leaders) who gave the Pledge of allegiance to Allah's Apostle. We gave the oath of allegiance, that we would not join partners in worship besides Allah, would not steal, would not commit illegal sexual intercourse, would not kill a life which Allah has … Continue reading Sahih Bukhari Volume 9, Book 83, Hadith Number 12.