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 (PBUH said: "When any one of you urinates, let him not hold his penis in his right hand." Translation Not Available
Book Ref: Sunan An Nisai Book 1 Hadith 24
Web Ref: Sunan An Nisai Vol 1 Book 1 Hadith 24