It is narrated from Hazrat Anas bin Malik (may Allah be pleased with him) that Abu al-Qasim (peace and blessings be upon him) said: Whoever deliberately attributes a false statement to me, he should make his abode in Hell.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 13100
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد حسن، خ: 108، م: فى المقدمة: 2.