The Prophet ﷺ said, "The recitation of Psalms (David's Qur'an) was made light and easy for David that he used to have his ridding animal be saddled while he would finish the recitation before the servant had saddled it."
عَنِ النَّبِيِّ ﷺ قَالَ خُفِّفَ عَلَى دَاوُدَ الْقِرَاءَةُ فَكَانَ يَأْمُرُ بِدَابَّتِهِ لِتُسْرَجَ فَكَانَ يَقْرَأُ قَبْلَ أَنْ يَفْرُغَ يَعْنِي الْقُرْآنَ