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.  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ عَدْوَى وَلاَ صَفَرَ وَلاَ هَامَةَ فَقَالَ أَعْرَابِيٌّ يَا رَسُولَ اللَّهِ فَمَا بَالُ الإِبِلِ تَكُونُ فِي الرَّمْلِ كَأَنَّهَا الظِّبَاءُ فَيَجِيءُ الْبَعِيرُ الأَجْرَبُ فَيَدْخُلُ فِيهَا فَيُجْرِبُهَا كُلَّهَا قَالَ فَمَنْ أَعْدَى الأَوَّلَ  

There is no transitive disease, no evil omen, no safar, no hama. A desert Arab said: Allah's, Messenger.... The rest of the hadith is the same.  

إِنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ عَدْوَى وَلاَ طِيَرَةَ وَلاَ صَفَرَ وَلاَ هَامَةَ فَقَالَ أَعْرَابِيٌّ يَا رَسُولَ اللَّهِ بِمِثْلِ حَدِيثِ يُونُسَ  

There is no trahsitive disease. Thereupon a desert Arab stood up. The rest of the hadith is the same and in the hadith transmitted on the authority of Zuhri' the Prophet ﷺ is reported to have said: There is no transitive disease, no safar, no hama.  

قَالَ النَّبِيُّ ﷺ لاَ عَدْوَى فَقَامَ أَعْرَابِيٌّ فَذَكَرَ بِمِثْلِ حَدِيثِ يُونُسَ وَصَالِحٍ وَعَنْ شُعَيْبٍ عَنِ الزُّهْرِيِّ قَالَ حَدَّثَنِي السَّائِبُ بْنُ يَزِيدَ ابْنُ أُخْتِ نَمِرٍ أَنَّ النَّبِيَّ ﷺ قَالَ لاَ عَدْوَى وَلاَ صَفَرَ وَلاَ هَامَةَ  

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.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ عَدْوَى وَيُحَدِّثُ أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يُورِدُ مُمْرِضٌ عَلَى مُصِحٍّ قَالَ أَبُو سَلَمَةَ كَانَ أَبُو هُرَيْرَةَ يُحَدِّثُهُمَا كِلْتَيْهِمَا عَنْ رَسُولِ اللَّهِ ﷺ ثُمَّ صَمَتَ أَبُو هُرَيْرَةَ بَعْدَ ذَلِكَ عَنْ قَوْلِهِ لاَ عَدْوَى وَأَقَامَ عَلَى أَنْ لاَ يُورِدُ مُمْرِضٌ عَلَى مُصِحٍّ قَالَ فَقَالَ الْحَارِثُ بْنُ أَبِي ذُبَابٍ وَهُوَ ابْنُ عَمِّ أَبِي هُرَيْرَةَ قَدْ كُنْتُ أَسْمَعُكَ يَا أَبَا هُرَيْرَةَ تُحَدِّثَنَا مَعَ هَذَا الْحَدِيثِ حَدِيثًا آخَرَ قَدْ سَكَتَّ عَنْهُ كُنْتَ تَقُولُ قَالَ رَسُولُ اللَّهِ ﷺ لاَ عَدْوَى فَأَبَى أَبُو هُرَيْرَةَ أَنْ يَعْرِفَ ذَلِكَ وَقَالَ لاَ يُورِدُ مُمْرِضٌ عَلَى مُصِحٍّ فَمَا رَآهُ الْحَارِثُ فِي ذَلِكَ حَتَّى غَضِبَ أَبُو هُرَيْرَةَ فَرَطَنَ بِالْحَبَشِيَّةِ فَقَالَ لِلْحَارِثِ أَتَدْرِي مَاذَا قُلْتُ قَالَ لاَ قَالَ أَبُو هُرَيْرَةَ قُلْتُ أَبَيْتُ قَالَ أَبُو سَلَمَةَ وَلَعَمْرِي لَقَدْ كَانَ أَبُو هُرَيْرَةَ يُحَدِّثُنَا أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ عَدْوَى فَلاَ أَدْرِي أَنَسِيَ أَبُو هُرَيْرَةَ أَوْ نَسَخَ أَحَدُ الْقَوْلَيْنِ الآخَرَ  

There is no transitive disease and he also reported along with it: The ill should not be taken to the healthy.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ عَدْوَى وَيُحَدِّثُ مَعَ ذَلِكَ لاَ يُورِدُ الْمُمْرِضُ عَلَى الْمُصِحِّ بِمِثْلِ حَدِيثِ يُونُسَ  

This hadith has been reported on the authority of Zuhri with the same chain of transmitters.  

عَنِ الزُّهْرِيِّ بِهَذَا الإِسْنَادِ نَحْوَهُ  

There is no transitive disease, no huma, no star promising rain, no safar.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ عَدْوَى وَلاَ هَامَةَ وَلاَ نَوْءَ وَلاَ صَفَرَ  

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.  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ عَدْوَى وَلاَ طِيَرَةَ وَلاَ غُولَ  

There is no transitive disease, no ghoul, no safar.  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ عَدْوَى وَلاَ غُولَ وَلاَ صَفَرَ  

There is no transitive disease, no safar, no ghoul. He (the narrator) said: I heard Abu Zubair say: Jabir explained for them the word safar. Abu Zubair said: safar means belly. It was said to Jabir: Why is it so? He said that it was held that safar implied the worms of the belly, but he gave no explanation of ghoul. Abu Zubair said: Ghoul is that which kills the travellers.  

سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ لاَ عَدْوَى وَلاَ صَفَرَ وَلاَ غُولَ وَسَمِعْتُ أَبَا الزُّبَيْرِ يَذْكُرُ أَنَّ جَابِرًا فَسَّرَ لَهُمْ قَوْلَهُ وَلاَ صَفَرَ فَقَالَ أَبُو الزُّبَيْرِ الصَّفَرُ الْبَطْنُ فَقِيلَ لِجَابِرٍ كَيْفَ قَالَ كَانَ يُقَالُ دَوَابُّ الْبَطْنِ قَالَ وَلَمْ يُفَسِّرِ الْغُولَ قَالَ أَبُو الزُّبَيْرِ هَذِهِ الْغُولُ الَّتِي تَغَوَّلُ