Sahih Muslim 2222
Sahih Muslim · Book 39: The Book of Greetings · There Is No 'Adwa, No Tiyarah (Evil Omens), No Hamah. No Safar, No Nawa', And No Ghoul, And No Sick Camel Should Be Brought To A Healthy Camel
Jabir b. 'Abdullah reported Allah's Apostle (ﷺ) as saying:
وَحَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ ، حَدَّثَنَا رَوْحُ بْنُ عُبَادَةَ ، حَدَّثَنَا ابْنُ جُرَيْجٍ ، أَخْبَرَنِي أَبُو الزُّبَيْرِ أَنَّهُ سَمِعَ جَابِرَ بْنَ عَبْدِ اللَّهِ ، يَقُولُ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم 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 .
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.