Sayyiduna Abu Ayyash Zurqi (may Allah be pleased with him) narrates that at the place of Usfan, we were with the Prophet Muhammad (peace and blessings be upon him) facing the polytheists. Their commander was Sayyiduna Khalid bin Walid (may Allah be pleased with him), who had not yet embraced Islam. They were positioned between us and the Qiblah. The Prophet (peace and blessings be upon him) led us in the Zuhr prayer. The polytheists said: "They (the Muslims) were in such a state that we could have taken advantage of their heedlessness." Then they said: "Another prayer is about to come upon them, which is dearer to them than their lives and their sons." Jibreel (peace be upon him) descended with this verse between the Zuhr and Asr prayers: «فَإِذَا كُنْتَ فِيهِمْ فَأَقَمْتَ لَهُمُ الصَّلَاةَ» (When you are among them and lead them in prayer... etc.). The narrator says: When the time for prayer came, by the order of the Prophet (peace and blessings be upon him), they picked up their weapons. Then we formed two rows behind him. He bowed (in ruku‘), and we all bowed. When he rose from ruku‘, we also rose. Then those in the first row performed prostration (sajdah) with the Prophet (peace and blessings be upon him), while those in the second row stood guarding them. When the first row finished their prostration and stood up, the second row sat in their place and performed prostration. Then the rear row came forward and the front row moved back. Then all of us bowed (in ruku‘) with the Prophet (peace and blessings be upon him) and rose from ruku‘. Then those in the first row performed prostration with the Prophet (peace and blessings be upon him), while those in the second row stood guarding them. When the first row finished their prostration and sat, the second row also performed prostration. Then the Prophet (peace and blessings be upon him) said the salam and left. The Prophet (peace and blessings be upon him) performed the prayer (of fear) in this manner twice: once at Usfan and once in the region of Banu Sulaym. ‘Ata and Abu Zubair (may Allah be pleased with them both) have also narrated this prayer of the Prophet (peace and blessings be upon him) from Sayyiduna Jabir (may Allah be pleased with him).