This calls for bowing (rukūʿ) and prostration (sujūd) proportionate to the length of the recitation; for that reason he said, “His prayer was of even duration,” meaning that its various parts were kept close to one another in length.
Anas spoke truly, for the Prophet—may Allah bless him and grant him peace—used to recite in the Dawn Prayer about sixty to one hundred verses. In the two rakʿahs he would choose from the longer sūrahs of the mufassal, such as “Alif Lām Mīm. The Revelation” (as-Sajdah), “Has there come” (al-Insān), as-Ṣāffāt, and Qāf. At times he would read something even longer, and at other times something lighter.
As for ʿUmar, may Allah be pleased with him, he would lead Fajr with Sūrahs Yūnus, Hūd, and Yūsuf—perhaps knowing that the people behind him preferred that.
Muʿādh, may Allah be pleased with him, once prayed the last prayer (ʿIshāʾ) behind him, then went to the clan of ʿAmr ibn ʿAwf in Qubāʾ and led them, reciting Sūrat al-Baqarah. The Prophet, peace and blessings be upon him, objected, saying: “Muʿādh, are you a cause of hardship? When you lead the people, make it light; for behind you are the elderly, the weak, and those with pressing needs. Why did you not recite ‘Glorify the Name of your Lord Most High’ or ‘By the sun and its brightness’?”