Musannaf Ibn Abi Shayba 3:5915

Ghundar narrated to us, from Shu'bah, from Mansur, from Mujahid, who said: I heard him narrating from Abu Ayyash al-Zuraqi that the Prophet, peace and blessings of Allah be upon him, was facing the enemy at Usfan, and over the polytheists was Khalid ibn al-Walid. The Prophet, peace and blessings of Allah be upon him, prayed the Dhuhr prayer with them. Then the polytheists said: "They have a prayer after this one that is more beloved to them than their wealth and their children." So the Messenger of Allah, peace and blessings of Allah be upon him, prayed with them and arranged them behind him in two rows. He said: The Messenger of Allah, peace and blessings of Allah be upon him, bowed with them all together. When they raised their heads from prostration, the row that was next to him prostrated, while the others remained standing. When they raised their heads from prostration, the rear row prostrated, having bowed with the Messenger of Allah, peace and blessings of Allah be upon him. He said: Then the front row moved back and the rear row moved forward, and each of them stood in the place of the other. Then he bowed, and the others stood. When they finished their prostration, the others prostrated. Then the Prophet, peace and blessings of Allah be upon him, performed the taslim upon them.