Sunan Ibn Majah, Book 1, Hadith 521 (In-Book) ⓘ
Qais bin Talq Al-Hanafi narrated that his father said: "I heard the Messenger of Allah being asked about touching the penis. He said: 'That does not require ablution, because it is a part of you (your body).'"
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، حَدَّثَنَا مُحَمَّدُ بْنُ جَابِرٍ، قَالَ سَمِعْتُ قَيْسَ بْنَ طَلْقٍ الْحَنَفِيَّ، عَنْ أَبِيهِ، قَالَ سَمِعْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ سُئِلَ عَنْ مَسِّ الذَّكَرِ فَقَالَ " لَيْسَ فِيهِ وُضُوءٌ إِنَّمَا هُوَ مِنْكَ " .
also referenced under: Hadith 483 (Reference) & Volume 1, Book 1, Hadith 483 (DarusSalam)