It was narrated from Marwan bin Al-Hakam that:

He asked Abu Hurairah: "Did you offer the fear prayer with the Messenger of Allah ﷺ?" Abu Hurairah said: "Yes." He asked: "When?" He said: "In the year of the campaign to Najd. The Messenger of Allah ﷺ stood up to pray 'Asr and a group stood with him, and another group as facing the enemy, with their backs toward the Qiblah. The Messenger of Allah ﷺ said the takbir, and they all said the takbir, those who were with him and those who were with him facing the enemy. Then the Messenger of Allah ﷺ bowed once and the group that was with him bowed, then he and the group that was with him prostrated twice, while the others were standing facing the enemy. Then the Messenger of Allah ﷺ stood up and the group that was with him stood and went to face the enemy, and the group that had been facing the enemy came and bowed and prostrated while the Messenger of Allah ﷺ was standing there. Then they stood up, and the Messenger of Allah ﷺ bowed again, and they bowed and prostrated with him. Then the group that had been facing the enemy came and bowed and prostrated, while the Messenger of Allah ﷺ and those who were with him were sitting. Then the Messenger of Allah ﷺ said the taslim and they all said the taslim. So the Messenger of Allah ﷺ had prayed two rak'ahs and each of the two groups had prayed two rak'ahs."

أَخْبَرَنِي عُبَيْدُ اللَّهِ بْنُ فَضَالَةَ بْنِ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ بْنُ يَزِيدَ الْمُقْرِئُ، ح وَأَنْبَأَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ يَزِيدَ، قَالَ حَدَّثَنَا أَبِي قَالَ، حَدَّثَنَا حَيْوَةُ، وَذَكَرَ، آخَرَ قَالاَ حَدَّثَنَا أَبُو الأَسْوَدِ، أَنَّهُ سَمِعَ عُرْوَةَ بْنَ الزُّبَيْرِ، يُحَدِّثُ عَنْ مَرْوَانَ بْنِ الْحَكَمِ، أَنَّهُ سَأَلَ أَبَا هُرَيْرَةَ هَلْ صَلَّيْتَ مَعَ رَسُولِ اللَّهِ ﷺ صَلاَةَ الْخَوْفِ فَقَالَ أَبُو هُرَيْرَةَ نَعَمْ . قَالَ مَتَى قَالَ عَامَ غَزْوَةِ نَجْدٍ قَامَ رَسُولُ اللَّهِ ﷺ لِصَلاَةِ الْعَصْرِ وَقَامَتْ مَعَهُ طَائِفَةٌ وَطَائِفَةٌ أُخْرَى مُقَابِلَ الْعَدُوِّ وَظُهُورُهُمْ إِلَى الْقِبْلَةِ فَكَبَّرَ رَسُولُ اللَّهِ ﷺ فَكَبَّرُوا جَمِيعًا الَّذِينَ مَعَهُ وَالَّذِينَ يُقَابِلُونَ الْعَدُوَّ ثُمَّ رَكَعَ رَسُولُ اللَّهِ ﷺ رَكْعَةً وَاحِدَةً وَرَكَعَتْ مَعَهُ الطَّائِفَةُ الَّتِي تَلِيهِ ثُمَّ سَجَدَ وَسَجَدَتِ الطَّائِفَةُ الَّتِي تَلِيهِ وَالآخَرُونَ قِيَامٌ مُقَابِلَ الْعَدُوِّ ثُمَّ قَامَ رَسُولُ اللَّهِ ﷺ وَقَامَتِ الطَّائِفَةُ الَّتِي مَعَهُ فَذَهَبُوا إِلَى الْعَدُوِّ فَقَابَلُوهُمْ وَأَقْبَلَتِ الطَّائِفَةُ الَّتِي كَانَتْ مُقَابِلَ الْعَدُوِّ فَرَكَعُوا وَسَجَدُوا وَرَسُولُ اللَّهِ ﷺ قَائِمٌ كَمَا هُوَ ثُمَّ قَامُوا فَرَكَعَ رَسُولُ اللَّهِ ﷺ رَكْعَةً أُخْرَى وَرَكَعُوا مَعَهُ وَسَجَدَ وَسَجَدُوا مَعَهُ ثُمَّ أَقْبَلَتِ الطَّائِفَةُ الَّتِي كَانَتْ مُقَابِلَ الْعَدُوِّ فَرَكَعُوا وَسَجَدُوا وَرَسُولُ اللَّهِ ﷺ قَاعِدٌ وَمَنْ مَعَهُ ثُمَّ كَانَ السَّلاَمُ فَسَلَّمَ رَسُولُ اللَّهِ ﷺ وَسَلَّمُوا جَمِيعًا فَكَانَ لِرَسُولِ اللَّهِ ﷺ رَكْعَتَانِ وَلِكُلِّ رَجُلٍ مِنَ الطَّائِفَتَيْنِ رَكْعَتَانِ رَكْعَتَانِ .