'Abdu’llah ibn Abi Qais said:

"I asked "A'isha (may Allah be well pleased with her) about the Qur’anic recitation of the Prophet (ﷺ): “Was he used to whispering the recitation, or pronouncing it audibly?” She said: “He used to do both. He would sometimes whisper and sometimes speak audibly.” I therefore said: “Praise be to Allah, who has granted us flexibility in the matter!”

حَدَّثَنَا قُتَيْبَةُ، قَالَ‏:‏ حَدَّثَنَا اللَّيْثُ، عَنْ مُعَاوِيَةَ بْنِ صَالِحٍ، عَنْ عَبْدِ اللهِ بْنِ أَبِي قَيْسٍ، قَالَ‏:‏ سَأَلْتُ عَائِشَةَ، عَنْ قِرَاءَةِ النَّبِيِّ صلى الله عليه وسلم أَكَانَ يُسِرُّ بِالْقِرَاءَةِ أَمْ يَجْهَرُ‏؟‏ قَالَتْ‏:‏ كُلُّ ذَلِكَ قَدْ كَانَ يَفْعَلُ قَدْ كَانَ رُبَّمَا أَسَرَّ وَرُبَّمَا جَهَرَ فَقُلْتُ‏:‏ الْحَمْدُ لِلَّهِ، الَّذِي جَعَلَ فِي الأَمْرِ سَعَةً‏.‏