Abu Hudhaifah narrated - and he was one of the companions of 'Abdullãh bin Mas'üd - from'Aishah who said:
"I told theProphet (ﷺ) about a man, so hesaid: 'I do not like to talk about aman, even if I were to get this orthat (for doing so)." She said: "Isaid: 'O Messenger of Allah!Safiyyah is a woman who is ..." andshe used her hand as if to indicatethat she is short - "So he said:'You have said a statement which,if it were mixed in with the waterof the sea, it would pollute it."
English reference: Vol. 4, Book 11, Hadith 2502
Arabic reference: Book 37, Hadith 2690