Narrated Sa'eed bin Jubair:

from Ibn 'Abbas, regarding: 'And offer your Salat neither aloud nor in a low voice (17:110)." He said: "It was revealed in Makkah. When the Messenger of Allah (ﷺ) would raise his voice with the Qur'an, the idolaters would insult him, the One Who revealed it, and the one who came with it. So Allah revealed: And offer your Salat neither aloud so that they would not insult the Qur'an and the One who revealed it, and the one who came with it, nor in a low voice (too low) such that you can let your Companions hear it, and learn it from you."

حَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ، حَدَّثَنَا سُلَيْمَانُ بْنُ دَاوُدَ، عَنْ شُعْبَةَ، عَنْ أَبِي بِشْرٍ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، وَلَمْ يَذْكُرْ عَنِ ابْنِ عَبَّاسٍ، وَهُشَيْمٍ، عَنْ أَبِي بِشْرٍ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ ‏:‏ ‏(‏وَلاَ تَجْهَرْ بِصَلاَتِكَ ‏)‏ قَالَ نَزَلَتْ بِمَكَّةَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا رَفَعَ صَوْتَهُ بِالْقُرْآنِ سَبَّهُ الْمُشْرِكُونَ وَمَنْ أَنْزَلَهُ وَمَنْ جَاءَ بِهِ فَأَنْزَلَ اللَّهُ ‏:‏ ‏(‏وَلاَ تَجْهَرْ بِصَلاَتِكَ ‏)‏ فَيَسُبُّوا الْقُرْآنَ وَمَنْ أَنْزَلَهُ وَمَنْ جَاءَ بِهِ ‏:‏ ‏(‏وَلاَ تُخَافِتْ بِهَا ‏)‏ عَنْ أَصْحَابِكَ بِأَنْ تُسْمِعَهُمْ حَتَّى يَأْخُذُوا عَنْكَ الْقُرْآنَ ‏.‏ قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ ‏.‏