وَعَنْ أَبِي مُوسَى
قَالَ: كُنْتُ مَعَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ذَاتَ يَوْمٍ فَأَرَادَ أَنْ يَبُولَ فَأَتَى دَمِثًا فِي أَصْلِ جِدَارٍ فَبَال ثُمَّ قَالَ: «إِذَا أَرَادَ أَحَدُكُمْ أَنْ يَبُولَ فليرتد لبوله»
One day when I was with the Prophet (sallallahu alayhi wa sallam) he wanted to pass water, so he went to some soft ground at the foot of a wall and did it, after which he said, “When any of you wishes to pass water, he should look for to do it in.”
Mishkat al-Masabih 321, Book 4, Purification, Hadith 57. 1 min read