It was narrated that Jabir said:
"The Messenger of Allah said: 'When the last people of this Ummah curse the first, (at that time) whoever conceals a Hadith will be concealing what Allah has revealed.'" (Maudu') (FR)
English reference (FR): Vol. 1, Book 1, Hadith 263 (FR)
Arabic reference (FR): Book 1, Hadith 275 (FR)