It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Whoever relates a report just as he heard it, then if it is righteousness and truth, its reward is yours; and if it is a lie, its sin is upon the one who started it."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7930