Jabir reported Allal's Messenger (ﷺ) as saying: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

Jabir reported Allah's Messenger (ﷺ) as saying:There is no transitive disease, no ghoul, no safar

Jabir b. 'Abdullah reported Allah's Apostle (ﷺ) as saying: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