مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 800
Prayer
The Nature of Prayer - Section 1
وَعَنْ جَابِرٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَفْضَلُ الصَّلَاةِ طُولُ الْقُنُوتِ» . رَوَاهُ مُسلم
Jabir reported God’s Messenger as saying, “The most excellent prayer consists in long standing in prayer.” Muslim transmitted it.
Mishkat al-Masabih, 800صَحِيح (الألباني)