ENOfficial
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.
Source: sunnah.com
Other translations
Arabic
وَأَخْرَجَ اَلطَّبَرَانِيُّ اَلنَّهْيَ عَن ْ 1 تَحْتِ اَلْأَشْجَارِ اَلْمُثْمِرَةِ, وَضَفَّةِ اَلنَّهْرِ الْجَارِي. مِنْ حَدِيثِ اِبْنِ عُمَرَ بِسَنَدٍ ضَعِيف ٍ 2 .
sunnah.com