سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 24
The Book of Purification
The Prohibition Of Touching One's Penis With the Right Hand When Relieving Oneself
أَخْبَرَنَا يَحْيَى بْنُ دُرُسْتَ، قَالَ أَنْبَأَنَا أَبُو إِسْمَاعِيلَ، - وَهُوَ الْقَنَّادُ - قَالَ حَدَّثَنِي يَحْيَى بْنُ أَبِي كَثِيرٍ، أَنَّ عَبْدَ اللَّهِ بْنَ أَبِي قَتَادَةَ، حَدَّثَهُ عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ إِذَا بَالَ أَحَدُكُمْ فَلاَ يَأْخُذْ ذَكَرَهُ بِيَمِينِهِ .
It was narrated from 'Abdullah bin Abi Qatadah, from his father, that the Messenger of Allah (ﷺ said: "When any one of you urinates, let him not hold his penis in his right hand."
Sunan an-Nasa'i, 24Sahih (Darussalam)