[Machine] We used to ensure the Prophet's ﷺ standing in the noon and afternoon prayers, so we stood in the first two units of the noon prayer for the duration of reciting Alif Lam Meem, the revelation of prostration verse, and we stood in the last two units for half of that. And we stood in the first two units of the afternoon prayer at the same duration as his standing in the last two units of the noon prayer. Similarly, we stood in the last two units of the afternoon prayer for half of that. This is the narration of Yahya bin Yahya.
كُنَّا نَحْرِزُ قِيَامَ رَسُولِ اللهِ ﷺ فِي الظُّهْرِ وَالْعَصْرِ فَحَرَزْنَا قِيَامَهُ فِي الرَّكْعَتَيْنِ الْأُولَيَيْنِ مِنَ الظُّهْرِ قَدْرَ قِرَاءَةِ الم تَنْزِيلُ السَّجْدَةِ وَحَرَزْنَا قِيَامَهُ فِي الْأُخْرَيَيْنِ قَدْرَ النِّصْفِ مِنْ ذَلِكَ وَحَرَزْنَا قِيَامَهُ فِي الرَّكْعَتَيْنِ الْأُولَيَيْنِ مِنَ الْعَصْرِ عَلَى قَدْرِ قِيَامِهِ فِي الرَّكْعَتَيْنِ الْأُخْرَيَيْنِ مِنَ الظُّهْرِ وَفِي الْأُخْرَيَيْنِ مِنَ الْعَصْرِ عَلَى النِّصْفِ مِنْ ذَلِكَ لَفْظُ حَدِيثِ يَحْيَى بْنِ يَحْيَى