I asked Khabbab bin Al-Art whether the Prophet ﷺ used to recite the Qur'an in the Zuhr and the ʿAsr prayers. He replied in the affirmative. I said, "How did you come to know that?" He replied, "From the movement of his beard."  

قُلْتُ لِخَبَّابِ بْنِ الأَرَتِّ أَكَانَ النَّبِيُّ ﷺ يَقْرَأُ فِي الظُّهْرِ وَالْعَصْرِ قَالَ نَعَمْ قَالَ قُلْتُ بِأَىِّ شَىْءٍ كُنْتُمْ تَعْلَمُونَ قِرَاءَتَهُ قَالَ بِاضْطِرَابِ لِحْيَتِهِ  

My father said, "The Prophet ﷺ used to recite Al-Fatiha along with another Sura in the first two rakʿat of the Zuhr and the ʿAsr prayers and at times a verse or so was audible to us."  

كَانَ النَّبِيُّ ﷺ يَقْرَأُ فِي الرَّكْعَتَيْنِ مِنَ الظُّهْرِ وَالْعَصْرِ بِفَاتِحَةِ الْكِتَابِ وَسُورَةٍ سُورَةٍ وَيُسْمِعُنَا الآيَةَ أَحْيَانًا