Sahih Bukhari

Narrated Anas bin Malik:Allah's Messenger (ﷺ) mentioned the greatest sins or he was asked about the greatest sins. He said, ""To join partners in worship with Allah; to kill a soul which Allah has forbidden to kill; and to be undutiful or unkind to one's parents."" The Prophet (ﷺ) added, ""Shall I inform you of the biggest of the great sins? That is the forged statement or the false witness."" Shu`ba (the sub-narrator) states that most probably the Prophet said, ""the false witness