Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tirmidhi:472Qutaybah > Mālik b. Anas > Abū Bakr b. ʿUmar b. ʿAbd al-Raḥman > Saʿīd b. Yasār

"I was with Ibn Umar on a journey and I fell behind him. He said: 'Where were you?' I said: 'I prayed Al-Witr.' He said: 'Is there not a good exampled for you in Messenger of Allah? I saw Messenger of Allah performing Al-Witr on his mount.'"  

الترمذي:٤٧٢حَدَّثَنَا قُتَيْبَةُ حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ عَنْ أَبِي بَكْرِ بْنِ عُمَرَ بْنِ عَبْدِ الرَّحْمَنِ عَنْ سَعِيدِ بْنِ يَسَارٍ قَالَ كُنْتُ أَمْشِي مَعَ ابْنِ عُمَرَ فِي سَفَرٍ فَتَخَلَّفْتُ عَنْهُ فَقَالَ أَيْنَ كُنْتَ فَقُلْتُ أَوْتَرْتُ فَقَالَ

أَلَيْسَ لَكَ فِي رَسُولِ اللَّهِ أُسْوَةٌ رَأَيْتُ رَسُولَ اللَّهِ ﷺ يُوتِرُ عَلَى رَاحِلَتِهِ قَالَ وَفِي الْبَابِ عَنِ ابْنِ عَبَّاسٍ  

قَالَ أَبُو عِيسَى حَدِيثُ ابْنِ عُمَرَ حَدِيثٌ حَسَنٌ صَحِيحٌ وَقَدْ ذَهَبَ بَعْضُ أَهْلِ الْعِلْمِ مِنْ أَصْحَابِ النَّبِيِّ ﷺ وَغَيْرِهِمْ إِلَى هَذَا وَرَأَوْا أَنْ يُوتِرَ الرَّجُلُ عَلَى رَاحِلَتِهِ وَبِهِ يَقُولُ الشَّافِعِيُّ وَأَحْمَدُ وَإِسْحَاقُ وَقَالَ بَعْضُ أَهْلِ الْعِلْمِ لاَ يُوتِرُ الرَّجُلُ عَلَى الرَّاحِلَةِ وَإِذَا أَرَادَ أَنْ يُوتِرَ نَزَلَ فَأَوْتَرَ عَلَى الأَرْضِ وَهُوَ قَوْلُ بَعْضِ أَهْلِ الْكُوفَةِ آخِرُ أَبْوَابِ الْوِتْرِ