Abu Hurairah reported,

The Messenger of Allah ﷺ camped between Dajnan and Usfan. The polytheists said, "These people have a prayer that is dearer to them than their fathers and their sons, namely the afternoon prayer. So unite your forces and launch a single attack against them all at once."Then Jibreel came to the Prophet ﷺ and instructed him to divide his companions into two groups. He would pray with one group while the other group stood guard behind them, keeping their weapons and remaining alert. Then the second group would come and pray with him while the first group took up their weapons and stood on guard. In this way, each group would perform one cycle of prayer with the Messenger of Allah ﷺ, while the Messenger of Allah ﷺ himself would perform two cycles.

حدثنا عبد الصمد حدثنا سعيد بن عبيد الهنائي حدثنا عبد الله بن شقيق

حدثنا أبو هريرة

أن رسول الله ﷺ نزل بين ضجنان وعسفان فقال المشركون إن لهؤلاء صلاة هي أحب إليهم من آبائهم وأبنائهم وهي العصر فأجمعوا أمركم فميلوا عليهم ميلة واحدة وإن جبريل عليه السلام أتى النبي ﷺ فأمره أن يقسم أصحابه شطرين فيصلي ببعضهم وتقوم الطائفة الأخرى وراءهم وليأخذوا حذرهم وأسلحتهم ثم تأتي الأخرى فيصلون معه ويأخذ هؤلاء حذرهم وأسلحتهم لتكون لهم ركعة ركعة مع رسول الله ﷺ ولرسول الله ﷺ ركعتان