Excellence of Standing in Prayer at Night Riyad as-Salihin 1176
Arabic hadith text
وعن جابر رضي الله عنه قال: سئل رسول الله صلى الله عليه وسلم : أي الصلاة أفضل؟ قال: "طول القنوت" ((رواه مسلم)).
Translation
Jabir (May Allah be pleased with him) reported
The Messenger of Allah (ﷺ) was asked: "Which Salat is the best?" He replied, " The best Salat is that in which Qiyam (the duration of standing) is longer."[Muslim].