عَنْ مُجَاهِدٍ قَالَ: كُنَّا مَعَ ابْنِ عُمَرَ (رَضِيَ اللَّهُ عَنْهُ) فِي سَفَرٍ فَمَرَّ بِمَكَانٍ فَحَادَ عَنْهُ، فَسُئِلَ لِمَ فَعَلْتَ؟ فَقَالَ: رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَعَلَ هَذَا فَفَعَلْتُ
Mujahid (may Allah have mercy on him) says: We were on a journey with Sayyiduna Abdullah bin Umar (may Allah be pleased with them both), so when he passed by a certain place, he moved to one side of it. He was asked why he did so. He replied: "I saw the Messenger of Allah (peace and blessings be upon him) do the same, so I did it as well."