بُلُوغُ الْمَرَامِ
Bulugh al-Maram 94
The Book of Purification
The Manners of Answering the Call of Nature
وَأَخْرَجَ اَلطَّبَرَانِيُّ اَلنَّهْيَ عَن ْ [1] تَحْتِ اَلْأَشْجَارِ اَلْمُثْمِرَةِ, وَضَفَّةِ اَلنَّهْرِ الْجَارِي. مِنْ حَدِيثِ اِبْنِ عُمَرَ بِسَنَدٍ ضَعِيف ٍ [2] .
At-Tabarani also narrated on the authority of Ibn ‘Umar (with a weak chain of narrators), the prohibition of relieving oneself under fruit trees and beside the bank of a flowing river.
Bulugh al-Maram, 94