Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) says: There are three things on which I could swear an oath. After this, the author recorded it as a mawquf report (the Companion's own statement), and its chain is munqati' (broken).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الإيمان / 110
Hadith Gradingمحدثین:موقوف، منقطع السند۔
Hadith Takhrij«اخرجه الامام الطبراني فى معجمه الكبير 3/257»