The Book of Prayer - Travellers
6/22. Chapter:
The best prayer is that in which one stands for a long time (tuwlul-qunut)
Sahih Muslim
حَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ، أَخْبَرَنَا أَبُو عَاصِمٍ، أَخْبَرَنَا ابْنُ جُرَيْجٍ، أَخْبَرَنِي أَبُو الزُّبَيْرِ، عَنْ جَابِرٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَفْضَلُ الصَّلاَةِ طُولُ الْقُنُوتِ " .
Jabir reported Allah's Messenger (ﷺ) as saying: The most excellent prayer is that in which the duration of standing is longer.
Reference : Sahih Muslim 756aIn-book reference : Book 6, Hadith 197USC-MSA web (English) reference : Book 4, Hadith 1652