Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him) that: "The greatest liars among people are al-sabbaghun and al-sawwaghun."
This is the preserved (mahfuz) version: the hadith of Hammam from Farqad. Some erred in it from Hammam, saying: from him, from Qatadah, from Yazid; and others said: from him, from Qatadah, from Anas; both of these are batil (false). It has also been narrated through another route from Abu Hurayrah, and it is said: from Abu Sa'id, as a marfu' (Prophetic) report.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 21178