There is no transitive disease, no ill omen, no ghoul. 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. (Using translation from Muslim 2222a)   

قَالَ رَسُولُ اللَّهِ ﷺ «لَا عَدْوَى وَلَا طِيَرَةَ وَيُعْجِبُنِي الْفَأْلُ»  

There is no transitive disease, but he is also reported to have said: A sick person should not be taken to one who is healthy. Abu Salama said that Abu Huraira used to narrate these two (different ahadith) from Messenger of Allah ﷺ, but afterwards Abu Huraira became silent on these words:" There is no transitive disease," but he stuck to this that the sick person should not be taken to one who is healthy. Harith b. Abu Dhubab (and he was the first cousin of Abu Huraira) said: Abu Huraira, I used to hear from you that you narrated to us along with this hadith and the other one also (there is no transitive disease), but now you observe silence about it. You used to say that Messenger of Allah ﷺ said: There is no transitive disease. Abu Huraira denied having any knowledge of that, but he said that the sick camel should not be taken to the healthy one. Harith, however, did not agree with him, which irritated Abu Huraira and he said to him some words in the Abyssinian language. He said to Harith: Do you know what I said to you? He said: No. Abu Huraira said: I simply denied having said it. Abu Salama sad: By my life, Abu Huraira in fact used to report Messenger of Allah ﷺ having said: There is no transitive disease. I do not know whether Abu Huraira has forgotten it or he deemed it an abrogated statement in the light of the other one. (Using translation from Muslim 2221a)   

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «لَا عَدْوَى» وَحَدَّثَ أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «لَا يُورِدُ مُمْرِضٌ عَلَى مُصِحٍّ» قَالَ أَبُو سَلَمَةَ فَكَانَ أَبُو هُرَيْرَةَ يُحَدِّثُ بِهِمَا كِلَيْهِمَا عَنْ رَسُولِ اللَّهِ ﷺ ثُمَّ صَمَتَ أَبُو هُرَيْرَةَ بَعْدَ ذَلِكَ عَنْ قَوْلِهِ «لَا عَدْوَى» وَأَقَامَ عَلَى أَنْ «لَا يُورِدُ مُمْرِضٌ عَلَى مُصِحٍّ» فَقَالَ الْحَارِثُ بْنُ أَبِي ذِئَابٍ وَهُوَ ابْنُ عَمِّ أَبِي هُرَيْرَةَ كُنْتُ أَسْمَعُكَ يَا أَبَا هُرَيْرَةَ تُحَدِّثُنَا مَعَ هَذَا الْحَدِيثِ حَدِيثًا آخَرَ قَدْ سَكَتَّ عَنْهُ كُنْتَ تَقُولُ قَالَ رَسُولُ اللَّهِ ﷺ «لَا عَدْوَى» فَأَبِي أَبُو هُرَيْرَةَ أَنْ يَعْرِفَ ذَلِكَ وَقَالَ «لَا يُورِدُ مُمْرِضٌ عَلَى مُصِحٍّ» قَالَ أَبُو سَلَمَةَ وَلَعَمْرِي لَقَدْ كَانَ أَبُو هُرَيْرَةَ يُحَدِّثُنَا أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «لَا عَدْوَى» وَلَا أَدْرِي أَنَسِيَ أَبُو هُرَيْرَةَ أَوْ نَسَخَ أَحَدُ الْقَوْلَيْنِ الْآخَرَ  

There is no infection, no safar, no hama. A desert Arab said: Messenger of Allah, how is it that when the camel is in the sand it is like a deer-then a camel afflicted with scab mixes with it and it is affected by sub? He (the Holy Prophet) said: Who infected the first one? 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. (Using translation from Muslim 2220a)  

قَالَ رَسُولُ اللَّهِ ﷺ «لَا عَدْوَى وَلَا صَفَرَ وَلَا هَامَةَ» فَقَالَ الْأَعْرَابِيُّ يَا رَسُولَ اللَّهِ فَمَا بَالُ الْإِبِلِ تَكُونُ فِي الرَّمْلِ كَأَنَّهَا الظِّبَاءُ فَيَجِيءُ الْبَعِيرُ الْأَجْرَبُ فَيَدْخُلُ فِيهَا فَيُجْرِبُهَا؟ قَالَ «فَمَنْ أَعْدَى الْأَوَّلَ؟ »  

[Machine] The messenger of Allah ﷺ said, "There is no superstition, no omens, no contagious diseases, and no bad luck." So a man said, "O messenger of Allah, we take the scabby sheep and put it among the healthy sheep, and then the healthy sheep get scabies. Who is the first one to have it?"  

قَالَ رَسُولُ اللَّهِ ﷺ «لَا طِيَرَةَ وَلَا هَامَةَ وَلَا عَدْوَى وَلَا صَفَرَ» فَقَالَ رَجُلٌ يَا رَسُولَ اللَّهِ إِنَّا لَنَأْخُذُ الشَّاةَ الْجَرْبَاءَ فَنَطْرَحُهَا فِي الْغَنَمِ فَتَجْرَبُ الْغَنَمُ؟ فَقَالَ رَسُولُ اللَّهِ ﷺ «فَمَنْ أَعْدَى الْأَوَّلَ؟ »  

[Machine] The Messenger of Allah ﷺ said, "There is neither 'adwaa (the spreading of disease without the permission of Allah) nor tiyarah (superstitious belief in bad omens). However, a camel may be infected by a disease and infect a hundred camels. So who is the primary cause of infection?"  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «لَا عَدْوَى وَلَا طِيَرَةَ جَرَبِ بَعِيرٌ وَأَجْرَبَ مِائَةً فَمَنْ أَعْدَى الْأَوَّلَ؟ »  

[Machine] An Arab came to the Prophet ﷺ and said, "O Messenger of Allah, the disease called Nukbah affects camels. It spreads to all the camels, causing them to have blisters." The Prophet ﷺ replied, "Who caused it first? It affects their lives, their calamities, and their sustenance."  

جَاءَ أَعْرَابِيٌّ إِلَى النَّبِيِّ ﷺ فَقَالَ يَا رَسُولَ اللَّهِ النُّقْبَةُ تَكُونُ بِمِشْفَرِ الْبَعِيرِ أَوْ بِعَجْبِهِ فَتَشْتَمِلُ الْإِبِلَ كُلَّهَا جَرَبًا فَقَالَ رَسُولُ اللَّهِ ﷺ «فَمَنْ أَعْدَى الْأَوَّلَ؟ حَيَاتُهَا وَمُصِيبَاتُهَا وَرِزْقُهَا»  

"The Messenger of Allah ﷺ took the hand of a leper and put it in the Qas'ah. Then he said: 'Eat in Allah's Name, trusting in Allah and relying upon Him.'" (Using translation from Tirmidhī 1817)   

أَخَذَ النَّبِيُّ ﷺ بِيَدِ مَجْذُومٍ فَأَدْخَلَهَا مَعَهُ فِي الْقَصْعَةِ وَقَالَ «كُلْ بِاسْمِ اللَّهِ ثِقَةً بِاللَّهِ وَتَوَكُّلًا عَلَيْهِ»  

[Machine] "The Messenger of Allah ﷺ used to believe in good omens and dislike bad omens."  

«كَانَ رَسُولُ اللَّهِ ﷺ يُعْجِبُهُ الْفَأْلُ وَيَكْرَهُ الطِّيَرَةَ»  

“The omen is polytheistic deed and anyone of us may think he sees an omen but Allah will dispel it by means of relying upon Him.” (Using translation from Ibn Mājah 3538)  

قَالَ رَسُولُ اللَّهِ ﷺ «الطِّيَرَةُ شِرْكٌ وَمَا مِنَّا إِلَّا وَلَكِنْ يُذْهِبُهُ اللَّهُ بِالتَّوَكُّلِ»  

[Machine] The Messenger of Allah ﷺ said, "There is no superstition, and if there is any, it is in the house, the horse, and the woman."  

قَالَ رَسُولُ اللَّهِ ﷺ «لَا طِيَرَةَ وَالطِّيَرَةُ عَلَى مَنْ تَطَيَّرَ وَإِنْ تَكُ فِي شَيْءٍ فَفِي الدَّارِ وَالْفَرَسِ وَالْمَرْأَةِ»  

I heard Messenger of Allah ﷺ as saying: There is no divination but the best type is the good omen. It was said to Messenger of Allah ﷺ: What is good omen? Thereupon he said: A good word which one of you hears. (Using translation from Muslim 2223a)  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ «لَا طِيَرَةَ وَخَيْرُهَا الْفَأْلُ» قِيلَ يَا رَسُولَ اللَّهِ وَمَا الْفَأْلُ؟ قَالَ «الْكَلِمَةُ الصَّالِحَةُ يَسْمَعُهَا أَحَدُكُمْ»  

I heard Messenger of Allah ﷺ as saying: There is no divination but the best type is the good omen. It was said to Messenger of Allah ﷺ: What is good omen? Thereupon he said: A good word which one of you hears. (Using translation from Muslim 2223a)   

قَالَ رَسُولُ اللَّهِ ﷺ «لَا طِيَرَةَ وَخَيْرُ الْفَأْلِ الْكَلِمَةُ الصَّالِحَةُ يَسْمَعُهَا أَحَدُكُمْ»  

[Machine] She heard the Prophet ﷺ saying, "Allow the birds to perch on their nests."  

أَنَّهَا سَمِعَتِ النَّبِيَّ ﷺ يَقُولُ «أَقِرُّوا الطَّيْرَ عَلَى مَكُنَاتِهَا»