She was asked about the Prophet's ﷺ recitation and his prayer.She replied, "Why do you ask about his prayer? He would pray, then sleep for as long as he had prayed, then pray again for as long as he had slept, then sleep again for as long as he had prayed, until morning came."Then she described his recitation, and her description showed it to be a clear recitation, letter by letter.
حدثنا قتيبة حدثنا الليث عن عبد الله بن عبيد الله بن أبي مليكة عن يعلى بن مملك أنه سأل
عن قراءة النبي ﷺ وصلاته فقالت ما لكم وصلاته كان يصلي ثم ينام قدر ما صلى ثم يصلي قدر ما نام ثم ينام قدر ما صلى حتى يصبح ثم نعتت قراءته فإذا هي تنعت قراءة مفسرة حرفا حرفا
[Its chain of transmission is hasan]. Abu Dawud narrated it in Witr, in the chapter on how it is recommended to recite in a measured, unhurried manner (tarteel), no. 1466, from the hadith of Layth bin Saad with the same wording, and Ibn Khuzayma graded it sahih, no. 1158.Yaala bin Mamlak was deemed trustworthy by Tirmidhi and Ibn Hibban, so his hadith does not fall below the level of hasan. See also no. 2927.