The Prophet ﷺ went out at night and found AbuBakr praying in a low voice, and he passed Umar ibn al-Khattab who was raising his voice while praying. When they both met the Prophet ﷺ together, the Prophet ﷺ said: I passed by you, AbuBakr, when you were praying in a low voice. He replied: I made Him hear with Whom I was holding intimate converse, Messenger of Allah. He (the Prophet) said to Umar: I passed by you when you were praying in a loud voice. He replied: Messenger of Allah, I was awakening the drowsy and driving away the Devil. Al-Hasan added in his version: The Prophet ﷺ said: Raise your voice a little, AbuBakr, and he said to Umar: Lower your voice a little.
عَنِ النَّبِيِّ ﷺ ح وَحَدَّثَنَا الْحَسَنُ بْنُ الصَّبَّاحِ حَدَّثَنَا يَحْيَى بْنُ إِسْحَاقَ أَخْبَرَنَا حَمَّادُ بْنُ سَلَمَةَ عَنْ ثَابِتٍ الْبُنَانِيِّ عَنْ عَبْدِ اللَّهِ بْنِ أَبِي رَبَاحٍ عَنْ أَبِي قَتَادَةَ أَنَّ النَّبِيَّ ﷺ خَرَجَ لَيْلَةً فَإِذَا هُوَ بِأَبِي بَكْرٍ ؓ يُصَلِّي يَخْفِضُ مِنْ صَوْتِهِ قَالَ وَمَرَّ بِعُمَرَ بْنِ الْخَطَّابِ وَهُوَ يُصَلِّي رَافِعًا صَوْتَهُ قَالَ فَلَمَّا اجْتَمَعَا عِنْدَ النَّبِيِّ ﷺ قَالَ النَّبِيُّ ﷺ يَا أَبَا بَكْرٍ مَرَرْتُ بِكَ وَأَنْتَ تُصَلِّي تَخْفِضُ صَوْتَكَ قَالَ قَدْ أَسْمَعْتُ مَنْ نَاجَيْتُ يَا رَسُولَ اللَّهِ قَالَ وَقَالَ لِعُمَرَ مَرَرْتُ بِكَ وَأَنْتَ تُصَلِّي رَافِعًا صَوْتَكَ قَالَ فَقَالَ يَا رَسُولَ اللَّهِ أُوقِظُ الْوَسْنَانَ وَأَطْرُدُ الشَّيْطَانَ زَادَ الْحَسَنُ فِي حَدِيثِهِ فَقَالَ النَّبِيُّ ﷺ يَا أَبَا بَكْرٍ ارْفَعْ مِنْ صَوْتِكَ شَيْئًا وَقَالَ لِعُمَرَ اخْفِضْ مِنْ صَوْتِكَ شَيْئًا