Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
suyuti:3813a –

The most excellent prayer is that in which the duration of standing is longer. (Using translation from Muslim 756a)   

السيوطي:٣٨١٣a –

"أفضل الصلاةِ طولُ القيام".  

الطحاوي، [ض] ضياء المقدسي في مختاره عن جابر بن نصر عن عبد الله بن حبشى

See similar narrations below:

Collected by Muslim
muslim:756a – ʿAbd b. Ḥumayd > Abū ʿĀṣim > Ibn Jurayj > Abū al-Zubayr > Jābir

The most excellent prayer is that in which the duration of standing is longer.  

مسلم:٧٥٦a – حَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ أَخْبَرَنَا أَبُو عَاصِمٍ أَخْبَرَنَا ابْنُ جُرَيْجٍ أَخْبَرَنِي أَبُو الزُّبَيْرِ عَنْ جَابِرٍ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ أَفْضَلُ الصَّلاَةِ طُولُ الْقُنُوتِ