عَنِ الْأَسْوَدِ قَالَ سَأَلْتُ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا عَنْ صَلَاةِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ بِاللَّيْلِ فَقَالَتْ يَنَامُ أَوَّلَهُ وَيَقُومُ آخِرَهُ وَفِي رِوَايَةٍ كَانَ يَنَامُ أَوَّلَ اللَّيْلِ وَيُحْيِي آخِرَهُ
Aswad says: I asked Sayyida Aisha (may Allah be pleased with her) about the night prayer of the Noble Prophet (peace and blessings be upon him). She replied: The Prophet (peace and blessings be upon him) used to sleep in the early part of the night and stand (in prayer) in the latter part.