Abdullah bin Yusuf al-Tunaysi عبد الله بن يوسف التنيسي · The Book of the Fear Prayer

"The fear prayer was no more than two prostrations like the prayer of these guards of yours today behind the Imams of yours, except that it was one group after another. One group stood, although they were all behind the Messenger of Allah (ﷺ), and one group prostrated with him, then the Messenger of Allah (ﷺ) stood up and they all stood with him. Then he bowed and they all bowed with him, then he prostrated and those who had…