حَدَّثَنَا إِسْحَاقُ بْنُ مُوسَى الْأَنْصَارِيُّ قَالَ: حَدَّثَنَا مَعْنٌ قَالَ: حَدَّثَنَا مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنِ السَّائِبِ بْنِ يَزِيدَ، عَنِ الْمُطَّلِبِ بْنِ أَبِي وَدَاعَةَ السَّهْمِيِّ، عَنْ حَفْصَةَ، زَوْجِ النَّبِيِّ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ قَالَتْ: «كَانَ رَسُولُ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي فِي سُبْحَتِهِ قَاعِدًا وَيَقْرَأُ بِالسُّورَةِ وَيُرَتِّلُهَا حَتَّى تَكُونَ أَطْوَلَ مِنْ أَطْوَلَ مِنْهَا»
It is narrated from the wife of the Prophet, Mother of the Believers, Sayyida Hafsa (may Allah be pleased with her), she says that the Messenger of Allah (peace and blessings be upon him) would (at times) perform voluntary prayers while sitting. He would recite the surah slowly and with pauses, until that surah would become longer than a surah that was originally longer than it.