Messenger of Allah ﷺ said, "O so-and-so, whenever you go to your bed (for sleeping) say, 'O Allah! I have surrendered myself over to you and have turned my face towards You, and leave all my affairs to You and depend on You and put my trust in You expecting Your reward and fearing Your punishment. There is neither fleeing from You nor refuge but with You. I believe in the Book (Qur'an) which You have revealed and in Your Prophet (Muhammad) whom You have sent.' If you then die on that night, then you will die as a Muslim, and if you wake alive in the morning then you will receive the reward." (See Hadith No. 323, Vol. 8)  

قَالَ رَسُولُ اللَّهِ ﷺ يَا فُلاَنُ إِذَا أَوَيْتَ إِلَى فِرَاشِكَ فَقُلِ اللَّهُمَّ أَسْلَمْتُ نَفْسِي إِلَيْكَ وَوَجَّهْتُ وَجْهِي إِلَيْكَ وَفَوَّضْتُ أَمْرِي إِلَيْكَ وَأَلْجَأْتُ ظَهْرِي إِلَيْكَ رَغْبَةً وَرَهْبَةً إِلَيْكَ لاَ مَلْجَأَ وَلاَ مَنْجَا مِنْكَ إِلاَّ إِلَيْكَ آمَنْتُ بِكِتَابِكَ الَّذِي أَنْزَلْتَ وَبِنَبِيِّكَ الَّذِي أَرْسَلْتَ فَإِنَّكَ إِنْ مُتَّ فِي لَيْلَتِكَ مُتَّ عَلَى الْفِطْرَةِ وَإِنْ أَصْبَحْتَ أَصَبْتَ أَجْرًا  

Messenger of Allah ﷺ said on the Day of (the battle of) the Clans, "O Allah! The Revealer of the Holy Book, The Quick Taker of Accounts! Defeat the clans and shake them."  

قَالَ رَسُولُ اللَّهِ ﷺ يَوْمَ الأَحْزَابِ اللَّهُمَّ مُنْزِلَ الْكِتَابِ سَرِيعَ الْحِسَابِ اهْزِمِ الأَحْزَابَ وَزَلْزِلْ بِهِمْ زَادَ الْحُمَيْدِيُّ حَدَّثَنَا سُفْيَانُ حَدَّثَنَا ابْنُ أَبِي خَالِدٍ سَمِعْتُ عَبْدَ اللَّهِ سَمِعْتُ النَّبِيَّ ﷺ  

(regarding the Verse):-- 'Neither say your prayer aloud, nor say it in a low tone.' (17.110) This Verse was revealed while Messenger of Allah ﷺ was hiding himself in Mecca, and when he raised his voice while reciting the Qur'an, the pagans would hear him and abuse the Qur'an and its Revealer and to the one who brought it. So Allah said:-- 'Neither say your prayer aloud, nor say it in a low tone.' (17.110) That is, 'Do not say your prayer so loudly that the pagans can hear you, nor say it in such a low tone that your companions do not hear you.' But seek a middle course between those (extremes), i.e., let your companions hear, but do not relate the Qur'an loudly, so that they may learn it from you.  

أُنْزِلَتْ وَرَسُولُ اللَّهِ ﷺ مُتَوَارٍ بِمَكَّةَ فَكَانَ إِذَا رَفَعَ صَوْتَهُ سَمِعَ الْمُشْرِكُونَ فَسَبُّوا الْقُرْآنَ وَمَنْ أَنْزَلَهُ وَمَنْ جَاءَ بِهِ وَقَالَ اللَّهُ تَعَالَى {وَلاَ تَجْهَرْ بِصَلاَتِكَ وَلاَ تُخَافِتْ بِهَا} لاَ تَجْهَرْ بِصَلاَتِكَ حَتَّى يَسْمَعَ الْمُشْرِكُونَ وَلاَ تُخَافِتْ بِهَا عَنْ أَصْحَابِكَ فَلاَ تُسْمِعُهُمْ {وَابْتَغِ بَيْنَ ذَلِكَ سَبِيلاً} أَسْمِعْهُمْ وَلاَ تَجْهَرْ حَتَّى يَأْخُذُوا عَنْكَ الْقُرْآنَ