It is narrated from Hazrat Ayman bin Khuraym (may Allah be pleased with him) that once the Prophet (peace and blessings be upon him) stood up to deliver a sermon and said three times: O people! False testimony is equal to associating partners with Allah. Then he recited this verse: So avoid the filth of idols and avoid speaking falsehood.
Hadith Referenceمسند احمد / مسند الشاميين / 17603
Hadith Gradingحکم دارالسلام:إسناده ضعيف، فاتك بن فضالة مجهول، وأيمن بن خريم مختلف فى صحبته