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حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا أَبُو أُسَامَةَ عَنْ عَبْدِ اللَّهِ بْنِ يَحْيَى التَّوْأَمِ عَنْ ابْنِ أَبِي مُلَيْكَةَ عَنْ أُمِّهِ عَنْ عَائِشَةَ قَالَتْانْطَلَقَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَبُولُ فَاتَّبَعَهُ عُمَرُ بِمَاءٍ فَقَالَ مَا هَذَا يَا عُمَرُ قَالَ مَاءٌ قَالَ مَا أُمِرْتُ كُلَّمَا بُلْتُ أَنْ أَتَوَضَّأَ وَلَوْ فَعَلْتُ لَكَانَتْ سُنَّةً

Narrated to us Abu Bakr bin Abu Syaibah, narrated to us Abu Usamah from Abdullah bin Yahya At Tau`amah from Ibnu Abu Mulaikah from his mother from Aisyah, she said: The Prophet shallallahu 'alaihi wasallam went to urinate, and Umar followed him with water. He asked: What is this, O Umar? Umar replied: Water. He said: I was not commanded to perform wudlu every time I urinate; if I did, it would become a sunnah.