It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "There is no reality to the hamah (the owl omen), no ill omen in the month of Safar, no disease is transmitted by itself, and two months of thirty days each are not completed (in succession)."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7770