Narrated 'Abd Allah b. 'Amr:

The Prophet ﷺ as saying to him: Complete the recitation of the Qu'ran in one month. He said: I have more strength. He (the Prophet) said: Complete the recitation in twenty days. He again said: I have more energy. He said : Recite in fifteen days. He again said: I have more energy. He said: Recite in ten days. He again said: I have more energy. He said: Recite in seven days, do not add to it.

Abu Dawud said: The tradition narrated by Muslim is more perfect.

حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، وَمُوسَى بْنُ إِسْمَاعِيلَ، قَالاَ أَخْبَرَنَا أَبَانُ، عَنْ يَحْيَى، عَنْ مُحَمَّدِ بْنِ إِبْرَاهِيمَ، عَنْ أَبِي سَلَمَةَ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو، أَنَّ النَّبِيَّ ﷺ قَالَ لَهُ " اقْرَإِ الْقُرْآنَ فِي شَهْرٍ " . قَالَ إِنِّي أَجِدُ قُوَّةً . قَالَ " اقْرَأْ فِي عِشْرِينَ " . قَالَ إِنِّي أَجِدُ قُوَّةً . قَالَ " اقْرَأْ فِي خَمْسَ عَشْرَةَ " . قَالَ إِنِّي أَجِدُ قُوَّةً . قَالَ " اقْرَأْ فِي عَشْرٍ " . قَالَ إِنِّي أَجِدُ قُوَّةً . قَالَ " اقْرَأْ فِي سَبْعٍ وَلاَ تَزِيدَنَّ عَلَى ذَلِكَ " . قَالَ أَبُو دَاوُدَ وَحَدِيثُ مُسْلِمٍ أَتَمُّ .