TIRMIDHI 472:
from 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 ٤٧٢:
عن سعيد بن يسار —
أَلَيْسَ لَكَ فِي رَسُولِ اللَّهِ أُسْوَةٌ رَأَيْتُ رَسُولَ اللَّهِ ﷺ يُوتِرُ عَلَى رَاحِلَتِهِ قَالَ وَفِي الْبَابِ عَنِ ابْنِ عَبَّاسٍ