His father said: "The Messenger of Allah ﷺ prayed two rak'ahs in Mina, and Abu Bakr prayed two rak'ahs, and Umar prayed two rak'ahs, and Uthman prayed (two rak'ahs) at the beginning of his Khilafah." (Using translation from Nasāʾī 1451)
«صَلَّى رَسُولُ اللهِ ﷺ بِمِنًى رَكْعَتَيْنِ وَصَلَّاهَا أَبُو بَكْرٍ رَكْعَتَيْنِ وَصَلَّاهَا عُمَرُ رَكْعَتَيْنِ وَصَلَّاهَا عُثْمَانُ صَدْرًا مِنْ خِلَافَتِهِ رَكْعَتَيْنِ»