Ibn 'Umar reported that the Messenger of Allah ﷺ used to say Nafl prayer on (the back of) his camel in whatever direction it took him.  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُصَلِّي سُبْحَتَهُ حَيْثُمَا تَوَجَّهَتْ بِهِ نَاقَتُهُ  

Ibn 'Umar reported that the Apostle ﷺ used to pray on (the back of) his camel in whatever direction it took him.  

أَنَّ النَّبِيَّ ﷺ كَانَ يُصَلِّي عَلَى رَاحِلَتِهِ حَيْثُ تَوَجَّهَتْ بِهِ  

" So whether you turn thither is Allah's face" (ii. 115).  

كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي وَهُوَ مُقْبِلٌ مِنْ مَكَّةَ إِلَى الْمَدِينَةِ عَلَى رَاحِلَتِهِ حَيْثُ كَانَ وَجْهُهُ قَالَ وَفِيهِ نَزَلَتْ { فَأَيْنَمَا تُوَلُّوا فَثَمَّ وَجْهُ اللَّهِ}  

" Whether you turn thither is Allah's face," and it was revealed in this context.  

وَقَالَ فِي هَذَا نَزَلَتْ  

I saw the Messenger of Allah ﷺ praying (Nafl prayer) on a donkey's back while his face was turned towards Khaibar.  

رَأَيْتُ رَسُولَ اللَّهِ ﷺ يُصَلِّي عَلَى حِمَارٍ وَهُوَ مُوَجِّهٌ إِلَى خَيْبَرَ  

I was travelling along with Ibn 'Umar on the way to Mecca. Sa'id said: When I apprehended dawn, I dismounted (the ride) and observed Witr prayer and then again joined him. Ibn 'Umar said to me: Where were you? I said: I apprehended the appearance of dawn, so I dismounted and observed Witr prayer. Upon this 'Abdullah said: Is there not a model pattern for you in the Messenger of Allah ﷺ? I said: Yes, by Allah, and (then) he said: The Messenger of Allah ﷺ used to observe Witr prayer on the camel's back.  

سَعِيدٌ فَلَمَّا خَشِيتُ الصُّبْحَ نَزَلْتُ فَأَوْتَرْتُ ثُمَّ أَدْرَكْتُهُ فَقَالَ لِي ابْنُ عُمَرَ أَيْنَ كُنْتَ فَقُلْتُ لَهُ خَشِيتُ الْفَجْرَ فَنَزَلْتُ فَأَوْتَرْتُ فَقَالَ عَبْدُ اللَّهِ أَلَيْسَ لَكَ فِي رَسُولِ اللَّهِ ﷺ أُسْوَةٌ فَقُلْتُ بَلَى وَاللَّهِ قَالَ إِنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُوتِرُ عَلَى الْبَعِيرِ  

'Abdullah b. Dinar reported on the authority of Ibn 'Umar that the Messenger of Allah ﷺ used to observe prayer on his ride (no matter) in which direction it had its face turned. 'Abdullah b. Dinar said that Ibn 'Umar used to do like that.  

أَنَّهُ قَالَ كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي عَلَى رَاحِلَتِهِ حَيْثُمَا تَوَجَّهَتْ بِهِ قَالَ عَبْدُ اللَّهِ بْنُ دِينَارٍ كَانَ ابْنُ عُمَرَ يَفْعَلُ ذَلِكَ  

'Abdullah b. 'Umar reported that the Messenger of Allah ﷺ used to observe Witr prayer on his ride.  

أَنَّهُ قَالَ كَانَ رَسُولُ اللَّهِ ﷺ يُوتِرُ عَلَى رَاحِلَتِهِ  

Salim b. 'Abdullah reported on the authority of his father that the Messenger of Allah (may peace be. upon him) used to observe Nafl (supererogatory) prayer on his ride no matter in what direction it turned its face, and he observed Witr too on it, but did not observe obligatory prayer on it.  

كَانَ رَسُولُ اللَّهِ ﷺ يُسَبِّحُ عَلَى الرَّاحِلَةِ قِبَلَ أَىِّ وَجْهٍ تَوَجَّهَ وَيُوتِرُ عَلَيْهَا غَيْرَ أَنَّهُ لاَ يُصَلِّي عَلَيْهَا الْمَكْتُوبَةَ  

'Abdullah b. 'Amir b. Rabi'a has reported on the authority of his father that he had seen the Messenger of Allah ﷺ observing Nafl player at night on a journey on the back of his ride in whichever direction it turned its face.  

أَخْبَرَهُ أَنَّهُ رَأَى رَسُولَ اللَّهِ ﷺ يُصَلِّي السُّبْحَةَ بِاللَّيْلِ فِي السَّفَرِ عَلَى ظَهْرِ رَاحِلَتِهِ حَيْثُ تَوَجَّهَتْ  

We met Anas b. Malik as he came to Syria at a place known as 'Ain-al-Tamar and saw him observing prayer on the back of his donkey with his face turned in that direction. (Hammam one of the narrators) pointed towards the left of Qibla, so I said to him: I find you observing prayer towards the side other than that of Qibla. Upon this he said: Had I not seen the Messenger of Allah ﷺ doing like this, I would not have done so at all.  

عَنْ يَسَارِ الْقِبْلَةِ فَقُلْتُ لَهُ رَأَيْتُكَ تُصَلِّي لِغَيْرِ الْقِبْلَةِ قَالَ لَوْلاَ أَنِّي رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَفْعَلُهُ لَمْ أَفْعَلْهُ