Sunan al-Nasa'i The Book of Shortening the Prayer When Traveling Aisha bint Abi Bakr al-'Ala' bin Zuhyr العلاء بن زهير بن عبد الله al-Fadl bin Dakayn, Abu Na'eem الفضل بن دكين أبو نعيم الملائي 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.” https://parallelquran.com/hadith/sunan-al-nasai-1456/