عَنْ سَمُرَةَ بْنِ جُنْدَبٍ وَالْمُغِيرَةِ بْنِ شُعْبَةَ رضي الله عنهما قَالَا: قَالَ رَسُولُ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ: «مَنْ حَدَّثَ عَنِّي بِحَدِيثٍ يُرَى أَنَّهُ كَذِبٌ، فَهُوَ أَحَدُ الْكَاذِبِينَ».
The Prophet (may Allah's peace and blessings be upon him) informs that if a person reports a Hadīth from him which he knows, thinks, or deems it highly likely to be false, he has lied about him (may Allah's peace and blessings be upon him). Sharing in the lying is the one who initially related it to him.
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