Sayyiduna Harithah bin al-Nu'man (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: "Three things will remain attached to my Ummah: taking evil omens, envy and suspicion." A man said: O Messenger of Allah, how can the one in whom they are found remove them? He (peace and blessings be upon him) said: "When you feel envy, seek forgiveness from Allah; when you have a suspicion, do not turn it into certainty; and when you take an evil omen, go ahead with your task."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3214