Riyad as-Salihin, Book 9, Hadith 1173 (In-Book) ⓘ
'Aishah (May Allah be pleased with her) reported: The Prophet would sleep during the early part of night and stand in Salat during the latter part.[Al-Bukhari and Muslim].
وعنها أن النبي صلى الله عليه وسلم، كان ينام أول الليل، ويقوم آخره فيصلي. ((متفق عليه)) .