Warding off waswasah

Narrated Abdullah ibn Abbas:

AbuZumayl said: I asked Ibn Abbas, saying: What is that I find in my breast? He asked: What is it? I replied: I swear by Allah, I cannot speak about it. He asked me: Is it something doubtful? and he laughed. He then said: No one could escape that, until Allah, the exalted, revealed: "If thou went in doubt as to what we have revealed unto thee, and ask those who have been reading the Book from before thee." He said: If you find something in your heart, say: He is the first and the Last, the Evident and the Immanent, and He has full knowledge of all things.

حَدَّثَنَا عَبَّاسُ بْنُ عَبْدِ الْعَظِيمِ، حَدَّثَنَا النَّضْرُ بْنُ مُحَمَّدٍ، حَدَّثَنَا عِكْرِمَةُ، - يَعْنِي ابْنَ عَمَّارٍ - قَالَ حَدَّثَنَا أَبُو زُمَيْلٍ، قَالَ سَأَلْتُ ابْنَ عَبَّاسٍ فَقُلْتُ مَا شَىْءٌ أَجِدُهُ فِي صَدْرِي قَالَ مَا هُوَ قُلْتُ وَاللَّهِ مَا أَتَكَلَّمُ بِهِ . قَالَ فَقَالَ لِي أَشَىْءٌ مِنْ شَكٍّ قَالَ وَضَحِكَ . قَالَ مَا نَجَا مِنْ ذَلِكَ أَحَدٌ - قَالَ - حَتَّى أَنْزَلَ اللَّهُ عَزَّ وَجَلَّ { فَإِنْ كُنْتَ فِي شَكٍّ مِمَّا أَنْزَلْنَا إِلَيْكَ فَاسْأَلِ الَّذِينَ يَقْرَءُونَ الْكِتَابَ مِنْ قَبْلِكَ } الآيَةَ قَالَ فَقَالَ لِي إِذَا وَجَدْتَ فِي نَفْسِكَ شَيْئًا فَقُلْ { هُوَ الأَوَّلُ وَالآخِرُ وَالظَّاهِرُ وَالْبَاطِنُ وَهُوَ بِكُلِّ شَىْءٍ عَلِيمٌ }

Abu Hurairah said; His companion came to him and said; Messenger of Allah! We have thoughts which we cannot dare talk about and we do not like that we have them or talk about them. He said:
Have you experienced that? They replied: yes. He said : that is clear faith.

حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا زُهَيْرٌ، حَدَّثَنَا سُهَيْلٌ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ جَاءَهُ نَاسٌ مِنْ أَصْحَابِهِ فَقَالُوا يَا رَسُولَ اللَّهِ نَجِدُ فِي أَنْفُسِنَا الشَّىْءَ نُعْظِمُ أَنْ نَتَكَلَّمَ بِهِ أَوِ الْكَلاَمَ بِهِ مَا نُحِبُّ أَنَّ لَنَا وَأَنَّا تَكَلَّمْنَا بِهِ . قَالَ " أَوَقَدْ وَجَدْتُمُوهُ " . قَالُوا نَعَمْ . قَالَ " ذَاكَ صَرِيحُ الإِيمَانِ " .