[Machine] I stayed at the house of Maymuna, so the Prophet ﷺ got up to pray in the night. I stood on his left side and he held my hand and placed me on his right. Then he prayed thirteen rak'ahs, and I estimated the amount of time he stood in each rak'ah. In each rak'ah he recited, "O you wrapped in garments" [Surah Al-Muzzammil, verse 1].
بِتُّ فِي بَيْتِ مَيْمُونَةَ فَقَامَ النَّبِيُّ ﷺ يُصَلِّي مِنَ اللَّيْلِ فَقُمْتُ مَعَهُ عَنْ يَسَارِهِ فَأَخَذَ بِيَدِي فَجَعَلَنِي عَنْ يَمِينِهِ ثُمَّ صَلَّى ثَلَاثَ عَشْرَةَ رَكْعَةً حَزَرْتُ قَدْرَ قِيَامِهِ فِي كُلِّ رَكْعَةٍ {يَا أَيُّهَا الْمُزَّمِّلُ} [المزمل 1]