وَعَن بسرة
قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا مَسَّ أَحَدُكُمْ ذَكَرَهُ فَلْيَتَوَضَّأْ»
Busra daughter of Safwan ibn Naufal reported God’s messenger as saying, “If any of you touches his penis he must perform ablution.” Malik, Ahmad, Abu Dawud, Tirmidhi, Nasai.