Riyad as-Salihin, Book 9, Hadith 1176 (In-Book) ⓘ
Jabir (May Allah be pleased with him) reported: The Messenger of Allah was asked: "Which Salat is the best?" He replied, " The best Salat is that in which Qiyam (the duration of standing) is longer."[Muslim].
وعن جابر رضي الله عنه قال: سئل رسول الله صلى الله عليه وسلم : أي الصلاة أفضل؟ قال: "طول القنوت" ((رواه مسلم)).