[Machine] The prayer of the Messenger of Allah ﷺ used to be three to five units in the summer, and five to seven units in the winter. This is mentioned in the hadith of Abu Dawood and is a matter that varies in different countries and regions, and it is estimated in each region according to its known practice for determining the timing of the disappearance of sunlight.
كَانَ قَدْرُ صَلَاةِ رَسُولِ اللهِ ﷺ فِي الصَّيْفِ ثَلَاثَةَ أَقْدَامٍ إِلَى خَمْسَةِ أَقْدَامٍ وَفِي الشِّتَاءِ خَمْسَةَ أَقْدَامٍ إِلَى سَبْعَةِ أَقْدَامٍ لَفْظُ حَدِيثِ أَبِي دَاوُدَ وَهَذَا أَمْرٌ يَخْتَلِفُ فِي الْبُلْدَانِ وَالْأَقَالِيمِ فَيُقَدَّرُ فِي كُلِّ إِقْلِيمٍ بِالْمَعْرُوفِ بِهِ بِأَمْرِ الزَّوَالِ