When we would pray behind the Messenger of Allah ﷺ, we liked to be on his right side. He (the Prophet) would sit turning his face towards us (and back towards the Ka'bah) ﷺ.  

كُنَّا إِذَا صَلَّيْنَا خَلْفَ رَسُولِ اللَّهِ ﷺ أَحْبَبْنَا أَنْ نَكُونَ عَنْ يَمِينِهِ فَيُقْبِلُ عَلَيْنَا بِوَجْهِهِ ﷺ  

[Machine] "When we used to pray behind the Messenger of Allah ﷺ , we would refrain from moving away from his right side. And I heard him say, 'O Lord, protect me from Your punishment on the Day You resurrect Your servants or gather Your servants.'"  

كُنَّا إِذَا صَلَّيْنَا خَلْفَ رَسُولِ اللهِ ﷺ مِمَّا أَحَبَّ أَوْ مِمَّا تُحِبُّ أَنْ نَقُومَ عَنْ يَمِينِهِ قَالَ وَسَمِعْتُهُ يَقُولُ رَبِّ قِنِي عَذَابَكَ يَوْمَ تَبْعَثُ عِبَادَكَ أَوْ تَجْمَعُ عِبَادَكَ  

[Machine] "When we used to pray with the Messenger of Allah ﷺ , we would choose to stand on his right side. One time, I heard him say, 'O Lord, protect me from Your punishment on the day You gather Your servants or resurrect them.'"  

كُنَّا إِذَا صَلَّيْنَا مَعَ رَسُولِ اللهِ ﷺ مِمَّا أَحَبَّ أَوْ نُحِبُّ أَنْ نَقُومَ عَنْ يَمِينِهِ فَسَمِعْتُهُ يَقُولُ رَبِّ قِنِي عَذَابَكَ يَوْمَ تَجْمَعُ عِبَادَكَ أَوْ تَبْعَثُ عِبَادَكَ  

When we prayed behind the Messenger of Allah ﷺ we cherished to be on his right side so that his face would turn towards us (at the end of the prayer), and he (the narrator) said: I heard him say: O my Lord! save me from Thy torment on the Day when Thoil, wouldst raise or gather Thy servants. (Using translation from Muslim 709a)   

كُنَّا إِذَا صَلَّيْنَا خَلْفَ رَسُولِ اللهِ ﷺ أَحْبَبْنَا أَنْ نَكُونَ عَنْ يَمِينِهِ لَيُقْبِلَ عَلَيْنَا بِوَجْهِهِ قَالَ فَسَمِعْتُهُ يَقُولُ رَبِّ قِنِي عَذَابَكَ يَوْمَ تَبْعَثُ عِبَادَكَ