حَدَّثَنَا أَسْوَدُ حَدَّثَنَا شَرِيكٌ عَنْ أَبِي إِسْحَاقَ عَنْ عَاصِمٍ عَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي بِالنَّهَارِ سِتَّ عَشْرَةَ رَكْعَةً
مسند امام احمد بن حنبل · Hadith 885
It was narrated that 'Ali (RA) said: The Messenger of Allah (PBUH) used to pray sixteen rak'ahs during the day.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020