Musnad Ahmad 28:227

Anas ibn Iyad narrated to us, Abu Hazim narrated to us, from Amr ibn Shu’ayb, from his father, from his grandfather, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "A person does not believe until he believes in the decree (al-qadar), its good and its evil." Abu Hazim said: "May Allah curse a religion that I am older than," meaning the denial of the decree (al-qadar).