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.  

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 ﷻ { 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 }  

Have you experienced that? They replied: yes. He said : that is clear faith.  

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  

A man came to the Prophet ﷺ and said: Messenger of Allah! One of us has thoughts of such nature that he would rather be reduced to charcoal than speak about them. He said: "Allah is Most Great, Allah is Most Great, Allah is Most Great. Praise be to Allah Who has reduced the guile of the devil to evil prompting."

Ibn Qudamah said "reduced his matter" instead of "reduced his guile".  

جَاءَ رَجُلٌ إِلَى النَّبِيِّ ﷺ فَقَالَ: يَا رَسُولَ اللَّهِ، إِنَّ أَحَدَنَا يَجِدُ فِي نَفْسِهِ يُعَرِّضُ بِالشَّىْءِ لأَنْ يَكُونَ حُمَمَةً أَحَبُّ إِلَيْهِ مِنْ أَنْ يَتَكَلَّمَ بِهِ۔ فَقَالَ: «اللَّهُ أَكْبَرُ، اللَّهُ أَكْبَرُ، اللَّهُ أَكْبَرُ، الْحَمْدُ لِلَّهِ الَّذِي رَدَّ كَيْدَهُ إِلَى الْوَسْوَسَةِ۔»

قَالَ ابْنُ قُدَامَةَ «رَدَّ أَمْرَهُ» مَكَانَ «رَدَّ كَيْدَهُ»۔