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 ill omen in the month of Safar, the hamah has no reality, and there is no contagion that spreads by itself."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7731