I heard Allah's Messenger (ﷺ) as saying: There is no divination but the best type is the good omen. It was said to Allah's Messenger (ﷺ): What is good omen? Thereupon he said: A good word which one of you hears.
Sahih Muslim Book 39, Hadith 150
← Previous Hadith 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.

Sahih Muslim Book 39, Hadith 149 Next Hadith → This hadith has been narrated on the authority of Zuhri with the same chain of transmitters but with a slight variation of wording.

Sahih Muslim Book 39, Hadith 151