Hazrat Mujahid narrates that Hazrat Ibn Umar (may Allah be pleased with them) would, after the break of dawn, perform the Sunnah prayers of Fajr and then sit cross-legged. We would sit around him. When he saw any of us dozing off, he would shake him; he himself would also be dozing in the cross-legged position. Then, when the prayer was established, he would get up and join the congregation.