رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1173
The Book of Virtues
Excellence of Standing in Prayer at Night
وَعَنْهَا أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ، كَانَ ينام أول الليل، ويقوم آخره فيصلي. ((مُتَّفَقٌ عَلَيْهِ)) .
'Aishah (May Allah be pleased with her) reported: The Prophet (ﷺ) would sleep during the early part of night and stand in Salat during the latter part. [Al-Bukhari and Muslim].
Riyad as-Salihin, 1173