It is reported from him (that is, Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him)) that he said: "On the Day of Resurrection, the person with the most sins will be the one who engaged most in (talk about) falsehood."
Al-Tabarani recorded it, and its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الزهد / 18183
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (8547)»