"I went out on a campaign with the Messenger of Allah ﷺ toward Najd. We confronted the enemy and formed ranks facing them. The Messenger of Allah ﷺ stood up and led us in prayer. Some of us stood with him and some of us faced the enemy. The Messenger of Allah ﷺ bowed and those who were with him bowed, and prostrated twice. Then they moved away and took the place of the others, and the other group who had not prayed came and he led them in bowing once and prostrating twice. Then the Messenger of Allah ﷺ said the salam and each of the Muslims stood up and bowed once, and prostrated twice individually." (Using translation from Nasāʾī 1539)   

غَزَوْتُ مَعَ رَسُولِ اللهِ ﷺ غَزْوَةً قِبَلَ نَجْدٍ فَوَافَيْنَا الْعَدُوَّ فَصَافَفْنَاهُمْ فَقَامَ رَسُولُ اللهِ ﷺ فَصَلَّى لَنَا فَقَامَتْ طَائِفَةٌ مِنَّا مَعَهُ وَأَقْبَلَتْ طَائِفَةٌ عَلَى الْعَدُوِّ فَرَكَعَ رَسُولُ اللهِ ﷺ بِمَنْ مَعَهُ رَكْعَةً وَسَجْدَتَيْنِ ثُمَّ انْصَرَفُوا فَكَانُوا مَكَانَ الطَّائِفَةِ الَّتِي لَمْ تُصَلِّ وَجَاءَتِ الطَّائِفَةُ الَّتِي لَمْ تُصَلِّ فَرَكَعَ بِهِمْ رَسُولُ اللهِ ﷺ رَكْعَةً وَسَجْدَتَيْنِ ثُمَّ سَلَّمَ رَسُولُ اللهِ ﷺ وَقَامَ كُلُّ رَجُلٍ مِنَ الْمُسْلِمِينَ فَرَكَعَ لِنَفْسِهِ رَكْعَةً وَسَجْدَتَيْنِ  

The Messenger of Allah ﷺ led one section in one rak'ah of prayer and the other section was facing the enemy. Then they turned away and took the position of the other section. They (the other section) came and he (the Prophet) led them in the second rak'ah. He then uttered the salutation. Thereafter they stood up and completed the remaining rak'ah, they went away and the other section completed their remaining rak'ah. Abu Dawud said: This tradition has been narrated by Nafi' and Khalid b. Ma'dan from Ibn 'Umar in like manner from the Prophet ﷺ. This has also been transmitted similarly by Masruq ad Yusuf b. Mihran on the authority of Ibn 'Abbas. This has been narrated by Yunus from al-Hasan from Abu Musa something similarly, saying that Abu Musa has done so. (Using translation from Abū Dāʾūd 1243)   

أَنَّ رَسُولَ اللهِ ﷺ صَلَّى صَلَاةَ الْخَوْفِ بِإِحْدَى الطَّائِفَتَيْنِ رَكْعَةً وَالطَّائِفَةُ الْأُخْرَى مُوَاجِهَةٌ الْعَدُوَّ ثُمَّ انْصَرَفُوا فَقَامُوا فِي مَقَامِ أُولَئِكَ وَجَاءَ أُولَئِكَ فَصَلَّى بِهِمْ رَكْعَةً أُخْرَى ثُمَّ سَلَّمَ عَلَيْهِمْ ثُمَّ قَامَ هَؤُلَاءِ فَقَضَوْا رَكْعَتَهُمْ وَقَامَ هَؤُلَاءِ فَقَضَوْا رَكْعَتَهُمْ  

[Machine] The Prophet ﷺ performed the prayer of fear, so a group stood with him and another group stood between them and the enemy. He prayed one unit of prayer with them, then these (ones) went to the rows of those (ones), and those (ones) came to the rows of these (ones), and he prayed one unit of prayer with them. Then, he greeted them, and then each group completed (their prayer) by praying two more units of prayer each. It was reported to us by Abu Al-Husayn, who narrated from Sulayman, who narrated from Ubaid bin Ghannam, who narrated from Abu Bakr bin Abi Shaybah, who narrated from Yahya bin Adam, who narrated from Sufyan, who narrated from Musa bin Uqbah, who narrated from Nafi, who narrated from Ibn Umar, who narrated from the Prophet ﷺ a similar narration.  

صَلَّى النَّبِيُّ ﷺ صَلَاةَ الْخَوْفِ فَقَامَتْ طَائِفَةٌ مَعَهُ وَطَائِفَةٌ مِنْهُمْ فِيمَا بَيْنَهُمْ وَبَيْنَ الْعَدُوِّ فَصَلَّى بِهِمْ رَكْعَةً ثُمَّ ذَهَبَ هَؤُلَاءِ إِلَى مَصَافِّ هَؤُلَاءِ وَجَاءَ هَؤُلَاءِ إِلَى مَصَافِّ هَؤُلَاءِ فَصَلَّى بِهِمْ رَكْعَةً ثُمَّ سَلَّمَ عَلَيْهِمْ ثُمَّ قَضَتِ الطَّائِفَتَانِ رَكْعَةً رَكْعَةً 6042 وَأَخْبَرَنَا أَبُو الْحُسَيْنِ أنبأ سُلَيْمَانُ ثنا عُبَيْدُ بْنُ غَنَّامٍ ثنا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ثنا يَحْيَى بْنُ آدَمَ عَنْ سُفْيَانَ عَنْ مُوسَى بْنِ عُقْبَةَ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ عَنِ النَّبِيِّ ﷺ مِثْلَهُ