“Musa bin Isma’il informed us, Hammad narrated to us, Abu at-Tayyah informed us, a sheikh told me, saying: When Abdullah bin Abbas arrived in Basra, he used to narrate from Abu Musa. Abdullah wrote to Abu Musa, asking him about certain things. Abu Musa wrote back to him: ‘I was once with the Messenger of Allah (peace be upon him), and he wanted to urinate. So, he came to a clean place at the base of a wall, urinated, and then said, ‘When any one of you wants to urinate, let him go to a secluded place for it.'”
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا حَمَّادٌ، أَخْبَرَنَا أَبُو التَّيَّاحِ، حَدَّثَنِي شَيْخٌ، قَالَ لَمَّا قَدِمَ عَبْدُ اللَّهِ بْنُ عَبَّاسٍ الْبَصْرَةَ فَكَانَ يُحَدَّثُ عَنْ أَبِي مُوسَى، فَكَتَبَ عَبْدُ اللَّهِ إِلَى أَبِي مُوسَى يَسْأَلُهُ عَنْ أَشْيَاءَ، فَكَتَبَ إِلَيْهِ أَبُو مُوسَى إِنِّي كُنْتُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم ذَاتَ يَوْمٍ فَأَرَادَ أَنْ يَبُولَ فَأَتَى دَمِثًا فِي أَصْلِ جِدَارٍ فَبَالَ ثُمَّ قَالَ صلى الله عليه وسلم “ إِذَا أَرَادَ أَحَدُكُمْ أَنْ يَبُولَ فَلْيَرْتَدْ لِبَوْلِهِ مَوْضِعًا ” .