Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) was asked about whispering (waswasah), and he (peace and blessings be upon him) said: "That is pure faith."
Al-Tabarani recorded it in al-Mu'jam al-Kabir, and its narrators are the narrators of the Sahih; the teacher of al-Tabarani is also thiqah (trustworthy). And Allah knows best.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الإيمان / 90
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«أخرجه المعجم الكبير للطبراني برقم: 10024، وأخرجه السنن الكبرى للنسائي برقم: 11215»