دعاء الوسوسة

روى أبو داود عن ابن عباس رضي الله عنهما قال {إِذَا وَجَدْتَ في نَفسِكَ شَيْئاً ( أى وسوسة ) فَقُلْ (هُوَ الأوَّلُ وَالآخِرُ وَالظَّاهِرُ وَالْبَاطِنُ، وَهُوَ بِكُلِّ شَيْءٍ عَلِيمٌ)}

Abu-Dawood narrated after Ibn-Abbas (May Allah be pleased with him), that he said:
{If you feel anything in your chest (i.e. whisper), say: He is the First and the Last, the Evident and the Immanent: and He has full knowledge of all things.}