Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "There is no (truth in the) owl (hamah), nor in evil omens, nor is disease contagious (by itself). If ill omen were in anything, it would be in the house, the horse and the woman."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسامة / 16523