Know that the call to prayer has four characteristics: The first characteristic is the folding of the takbir and the square of the two testimonies, and the rest of it is two. Some of those who say this attribute see the reversing of the two testimonies, and that is that he folds the two testimonies first secretly, then he recites them a second time, raising his voice with it, and this call to prayer is the call to prayer of the people of Medina. The second quality is the squaring of the first takbir and the two testimonies, and it is a dual. The rest of the call to prayer, and this is the call to prayer of the people of Mecca. The third description is the square of the first takbir and the second of the rest of the call to prayer, and this is the call to prayer of the people of Kufa. The fourth description is the squaring of the first takbir, the triangulation of the two testimonies, and the triangulation of the two verses. He begins with the shahada until he reaches Hayy Ali al-F