Messenger of Allah ﷺ said, "(There is) no 'Adwa (no contagious disease is conveyed without Allah's permission). nor is there any bad omen (from birds), nor is there any Hamah, nor is there any bad omen in the month of Safar, and one should run away from the leper as one runs away from a lion." Note: The majority of scholars interpret this to mean that these things in and of themselves do not transmit or cause harm through supernatural or hidden means but that Allah is ultimately in control and any fearful superstition around these is false.  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ عَدْوَى وَلاَ طِيَرَةَ وَلاَ هَامَةَ وَلاَ صَفَرَ وَفِرَّ مِنَ الْمَجْذُومِ كَمَا تَفِرُّ مِنَ الأَسَدِ  

[Machine] The Prophet ﷺ said, "There is no contagious disease, no superstitious belief in the owl, and no bad omen. Beware of the leper as you would beware of a lion."  

أَنَّ النَّبِيَّ ﷺ قَالَ لَا عَدْوَى وَلَا هَامَةَ وَلَا صَفَرَ وَاتَّقُوا الْمَجْذُومَ كَمَا يُتَّقَى الْأَسَدُ  

"لا عَدْوَى، وَلا طيَرَةَ، وَلا هَامَةَ، وَلا صَفَرَ، فَمَنْ أعْدَى الأولَ؟ ".  

"لا عَدْوَى، وَلا هَامَةَ، وَلا صَفَرَ، وَاتَّقُوا المَجْذُومَ، كَمَا يُتَّقَى الأسُودُ".