"The Messenger of Allah ﷺ used to stand in Zuhr and recite the equivalent of thirty verses in each Rak'ah, then in the first two Rak'ahs of 'Asr he would stand for the equivalent of fifteen verses." (Using translation from Nasāʾī 476)
كَانَ رَسُولُ اللهِ ﷺ يَقُومُ فِي الظُّهْرِ «فَيَقْرَأُ بِقَدْرِ ثَلَاثِينَ آيَةً فِي كُلِّ رَكْعَةٍ وَيَقُومُ فِي الْعَصْرِ فِي الرَّكْعَتَيْنِ الْأُولَيَيْنِ بِقَدْرِ خَمْسَ عَشْرَةَ آيَةً»