Musnad Aḥmad

‘Abdullāh ibn ‘Amr ibn al-‘Ās (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: “Whoever is prevented from doing something because of his belief in bad omens has thus committed polytheism. They said: What is the expiation of that? He said: It is to say: "O Allah, there is no good except Your good, nor omen except Your omen, and there is no god but You.’”