Maliks Muwatta Book 046, Hadith Number 004.

Section : The Prohibition against Talking about the Decree.

Yahya related to me from Malik from Ziyad ibn Sad from Amr ibn Muslim that Tawus al-Yamani said, "I found some of the companions of the Messenger of Allah, may Allah bless him and grant him peace, saying 'Everything is by decree.' " Tawus added, "I heard Abdullah ibn Umar say that The Messenger of Allah, may Allah bless him and grant him peace. said, 'Everything is by decree - even incapacity and ability,' (or 'ability and incapacity')."