When the Messenger of Allah (ﷺ) heard a word, and he liked it, he said: We took your omen from your mouth.
Sunan Abi Dawud Book 30, Hadith 14
← Previous Hadith The Prophet (ﷺ) as saying: There is no infection* and no evil omen, and I like a good omen. Good omen means a good word.

* 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.

Sunan Abi Dawud Book 30, Hadith 13 Next Hadith → People said: safar is a pain within the belly. I asked: What is hamah ? He said: People said (believed) that hamah which is an owl or a nightbird and which shrieks is the spirit of men. It is not the spirit of men. It is an animal.

Sunan Abi Dawud Book 30, Hadith 15